Documentation form for extraordinary bird sightings in Iowa, Thayer's Gull, February 7, 1992
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Field notes
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Birds--Identification Ornithology Rare birds
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1992-02-07
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N/A
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Manuscript, graphic, and printed material
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Documentation form supporting the sighting of a Thayer's Gull at Lock and Dam 14 contributed by Bob Cecil on February 7, 1992.
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Cecil, Robert I.
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Thayer's Gull
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Lock and Dam 14
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Iowa Ornithologists' Union | MS 166
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34
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35
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Rare bird documentation form for Thayer's Gull at Spirit Lake, 1997
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Field notes
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Birds--Identification Ornithology Rare birds
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1997-11-09
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull at Spirit Lake in Dickinson County, IA on November 9, 1997.
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Schoenewe, Lee A.
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Thayer's Gull
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Spirit Lake
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South Shore of Spirit Lake, Dickinson Co.
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Natural lakeshore
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The documentation form by Lee A. Schoenewe is the only one submitted and forms the basis of this record. Other observers include Eugene Armstrong, and Eloise Armstrong. | Elimination of similar species: Herring Gull - Lack of dark color in primaries + tail; Glaucous-size; Iceland - overall gray-brown tinge
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Iowa Ornithologists' Union | MS 166
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34
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35
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Rare bird documentation form for Thayer's Gull at Lock and Dam 15 in Davenport, 1996
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Field notes
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Birds--Identification Ornithology Rare birds
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1996-11-14
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull at Lock and Dam 15 in Davenport in Scott County, IA on November 14, 1996.
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Fuller, James L
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Thayer's Gull
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Lock and Dam 15
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Lock & Dam #15 of Mississippi River, Davenport (Scott County)
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The documentation form by Jim Fuller is the only one submitted and forms the basis of this record. | Elimination of similar species: The amount of black and white in the outer primary tips (both upper and underwing) is much less than would be expected in Ring-billed or Herring. Ring-billed is smaller with a dark ring on bill of adult. Although a few Herrings have somewhat bright pink legs, most are a dull pink. An Iceland adult should have a lighter mantle and upperwing, and less gray (not black) on the outer primary tips. | The original documentation form event lasted from 13:50:00/14:15:00.
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Iowa Ornithologists' Union | MS 166
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34
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35
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Rare bird documentation form for Thayer's Gull on the Mississippi River at Davenport, 1996
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Field notes
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Birds--Identification Ornithology Rare birds
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1996-01-07
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull on the Mississippi River at Davenport in Scott County, IA on January 7, 1996.
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Edwards, Chris
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Thayer's Gull
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Davenport
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Mississippi River, Davenport, Scott Co.
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River.
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The documentation form by Chris Edwards is the only one submitted and forms the basis of this record. Other observers include Curt Nelson. | Elimination of similar species: Herring Gull has black or dark brown primary tips and secondaries on upperside, dark gray primary tips on underside, whitish head, larger bill. Iceland Gull has white primary tips. | The original documentation form event lasted from 13:45:00/15:00:00.
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Iowa Ornithologists' Union | MS 166
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34
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35
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Rare bird documentation form for Thayer's Gull at Lock and Dam 15, 1995
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Field notes
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Birds--Identification Ornithology Rare birds
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1995-12-17
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull at Lock and Dam 15 in Scott County, IA on December 17, 1995.
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Petersen, Peter C.
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Thayer's Gull
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Lock and Dam 15
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Lock + Dam 15, seen from Iowa walking near Il. Shore mostly
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Open river
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The documentation form by Peter C. Petersen is the only one submitted and forms the basis of this record. Other observers include Walter Zuurdeeg, Mary Lou Petersen, and Kelly McKay. | Elimination of similar species: Herring Gull - heavier bill, very dark primary tips, no windows, tail darker with uneven white edge, secondaries dark from above, underwing much darker. Iceland Gull would show much lighter plumage overall, especially tail + primary tips. | The original documentation form event lasted from 12:05:00/12:10:00.
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Iowa Ornithologists' Union | MS 166
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34
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35
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Rare bird documentation form for Thayer's Gull at Lock and Dam 14, 1995
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Field notes
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Birds--Identification Ornithology Rare birds
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1995-01-03
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull at Lock and Dam 14 in Scott County, IA on January 3, 1995.
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Kent, Thomas H. (Thomas Hugh), 1934-
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Thayer's Gull
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Lock and Dam 14
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Lock and Dam 14, Scott Co., IA
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Mississippi River dam
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The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. | Elimination of similar species: I looked at many variable first-winter Herring Gulls today. All had more dark on wing tip and darker tail band. This bird was easy to pick out over and over again. | The original documentation form event lasted from 12:00:00/12:20:00.
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Iowa Ornithologists' Union | MS 166
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34
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35
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Rare bird documentation form for Thayer's Gull at Cone Marsh, 1983
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Field notes
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Birds--Identification Ornithology Rare birds
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1983-02-27
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull at Cone Marsh in Louisa County, IA on February 27, 1983.
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Newlon, Michael C.
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Thayer's Gull
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Cone Marsh Wildlife Management Area
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NE side Cone Marsh Louisa Co IA
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freshwater marsh with considerable open water
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The documentation form by Michael Newlon is the only one submitted and forms the basis of this record. Other observers include Carol S. Newlon. | Elimination of similar species: proportions, uniformly pale primaries would rule out herring; size/build rules out imm. glaucous. Bill much less heavy than imm. glaucous-winged. Remaining question is whether this bird is (over) a Thayer's Gull or a Kumlien's gull, presently considered separate species but widely suspected of being conspecific. Thayer's is extremely variable, and the limits of its variability are not well known, especially for imm. plumages. [Dwight says of his series of ad. thayeri, 'no two are alike'. It seems probable that there is clinal variation from west to east (thayeri - kumliesi [sic] - nominate glaucoides) and even possible that thayeri interbreeds with argenlatus at the western end of its range.] In addition several plumage descriptions in the literature may be assigned to birds of [illegible] age. Be that as it may: L. glaucoides glaucoides is supposed to have pale warm-brown primaries as a 1-W & paler, nearly whitish areas as a 2-W (though photos in grant's [sic] book show one 2-W with pale-brown primaries concolor with coverts). L. glaucoides kumlieni (in Dwight's plates) is assigned v. pale primaries as a 1-W, with slightly darker outer webs; would look uniform pale grey at any distance. His 2-W has darker primaries, again with slightly darker outer webs [I suspect these assignments should be reversed.] L. thayeri in published description is supposed to have darker primaries still, though not so dark as those of imm. Herring gulls, and lacking contrast with mantle. However some west coast thayeri-type gulls are very pale - though their back color is grey-brown rather than the warmer pale tan of L. glaucoides. (It is possible that these are really kumlieni but little data exists.) It is the similarity of the Cone Marsh Bird to one I photographed in Cal. that convinced me to classify it as thayeri - though kumleni cannot be unequivocally ruled out | The original documentation form event lasted from 11:10:00/12:30:00.
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Iowa Ornithologists' Union | MS 166
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35
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Rare bird documentation form for Thayer's Gull at Red Rock Dam, 1993
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Field notes
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Birds--Identification Ornithology Rare birds
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1993-12-24
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull at Red Rock Dam in Marion County, IA on December 24, 1993.
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Johnson, Ann
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Thayer's Gull
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Red Rock Dam
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Below Red Rock Dam, Marion County, Iowa
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Open river with gravel bars
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The documentation form by Ann Johnson is the only one submitted and forms the basis of this record. Other observers include Raymond Cummins. | Elimination of similar species: Dark eye and head/bill structure eliminated Herring Gull. | The original documentation form event lasted from 11:20:00/11:30:00.
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Iowa Ornithologists' Union | MS 166
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34
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35
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Rare bird documentation form for Thayer's Gull southeast of Jolly Roger Marina at Coralville Reservoir, 1993
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Field notes
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Birds--Identification Ornithology Rare birds
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1993-12-19
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull southeast of Jolly Roger Marina at Coralville Reservoir in Johnson County, IA on December 19, 1993.
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Pinkston, Randall, 1956-
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Thayer's Gull
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Jolly Rogers Campground
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Coralville Reservoir (1/4 - 1/2 mile southeast of Jolly Roger Marina), Johnson County, Iowa
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The documentation form by Randall Pinkston is the only one submitted and forms the basis of this record. | Elimination of similar species: Contrasted with first-winter Herring Gull above. First-winter Iceland typically much paler, especially the uppersurface of the primaries which are paler than the rest of the mantle, and Iceland should show mottling in the tertials and tail band. I suppose I cannot exclude a heavily-pigmented 'Kumlien's' Gull or an Iceland-Thayer's intergrade as described in Kevin Zimmer's Birding article. Both species are apparently highly variable. | The original documentation form event lasted from 10:45:00/11:15:00.
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Iowa Ornithologists' Union | MS 166
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34
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35
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Rare bird documentation form for Thayer's Gull at Red Rock Dam, 1993
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Field notes
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Birds--Identification Ornithology Rare birds
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1993-11-13
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull at Red Rock Dam in Marion County, IA on November 13, 1993.
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Pinkston, Randall, 1956-
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Thayer's Gull
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Red Rock Dam
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Lake Red Rock dam, Marion County, Iowa
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The documentation form by Randall Pinkston is the only one submitted and forms the basis of this record. Other observers include Jim Fuller. | Elimination of similar species: Compared with first-winter Herring Gull above. Pale Thayer's may be confused with same-aged Iceland Gull, but Iceland typically much paler than this individual. Iceland should also show pale, mottled tertials and tail which are concolor with the upperparts. This bird's tertials and tail were unpatterned (except at the edges of the tertials) and darker than the remainder of the upperparts. Iceland's folded primaries are paler than the remainder of the mantle, not darker as in this bird. Slaty-backed, Glaucous-winged, and Glaucous-winged X Western hybrid Gulls all larger, have more massive bills, less likely in Iowa. | The original documentation form event lasted from 10:15:00/10:40:00.
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Iowa Ornithologists' Union | MS 166
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34
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35
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Rare bird documentation form for Thayer's Gull at Iowa City, 1993
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Field notes
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Birds--Identification Ornithology Rare birds
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1993-01-19
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull at Iowa City in Johnson County, IA on January 19, 1993.
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Kent, Thomas H. (Thomas Hugh), 1934-
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Thayer's Gull
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Iowa City
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Iowa City, Johnson Co., Iowa.
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partially open Iowa River
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The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Jim Fuller. | Elimination of similar species: I distinguished this bird from Herring Gull based on smaller body size, smaller head and bill, shorter wing span, uniform light tan coloration, medium brown (not black) outer primaries, translucent primaries from below, and medium brown tail band. I distinguished it from Iceland Gull by the brown outer primaries, relatively more tan coloration, and medium brown tail band. | The original documentation form event lasted from 11:40:00/11:50:00.
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Iowa Ornithologists' Union | MS 166
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35
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Details for Accipiters during a Christmas Bird Count at Burlington, 1992
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Field notes
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Birds--Identification Ornithology Rare birds
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1992-12-19
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N/A
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Manuscript, graphic, and printed material
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Details for sightings of two Cooper's Hawks, Thayer's Gull and a Sharp-shinned Hawk at the Burlington area in Des Moines County, IA on December 19, 1992 by an unknown author.
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Iowa Ornithologists' Union
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Cooper's Hawk Thayer's Gull Sharp-shinned Hawk
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Burlington Sacred Heart Cemetery Burlington Municipal Airport
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Iowa Ornithologists' Union | MS 166
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34
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35
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Details for unusual bird sighting, 1992
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Field notes
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Birds--Identification Ornithology Rare birds
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1992-11-08
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N/A
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Manuscript, graphic, and printed material
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Rare bird sighting for a Thayer's Gull by Jim Fuller at Red Rock Reservoir in Marion County, IA on November 8, 1992.
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Fuller, James L
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Thayer's Gull
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Red Rock Dam
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Iowa Ornithologists' Union | MS 166
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34
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35
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Rare bird documentation form for Short-billed Dowitcher at Algona, 1988
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Field notes
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Birds--Identification Ornithology Rare birds
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1988-06-26
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Short-billed Dowitcher at Algona in Kossuth County, IA on June 26, 1988.
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Kenne, Matthew C.
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Short-billed Dowitcher
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Algona
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behind Hy-Vee Store Algona, Ia. Kossuth Co.
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almost - dry ponds / large mudflats
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The documentation form by Matthew Kenne is the only one submitted and forms the basis of this record. | Elimination of similar species: Long-billed Dowitcher is (supposed to be) rustier below through the belly, with bars not spots on the side of the breast, and more spots on the throat. The call is completely different than what I heard. | The original documentation form event lasted from 18:00:00/18:30:00.
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Iowa Ornithologists' Union | MS 166
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34
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26
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Rare bird documentation form for Thayer's Gull at Lock + Dam 15, 1992
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Field notes
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Birds--Identification Ornithology Rare birds
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1992-01-17
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Thayer's Gull at Lock and Dam 15 in Davenport in Scott County, IA on January 17, 1992.
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Kent, Thomas H. (Thomas Hugh), 1934-
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Thayer's Gull
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Lock and Dam 15
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Lock + Dam #15, Davenport, IA
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Mississippi River
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The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Jim Fuller and others. | Elimination of similar species: Herring Gull-see above. | The original documentation form event lasted from 15:30:00/15:35:00.
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Iowa Ornithologists' Union | MS 166
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35
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Rare bird documentation form for Franklin's Gull at Saylorville Reservoir, 1991
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Field notes
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Birds--Identification Ornithology Rare birds
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1991-02-01
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Franklin's Gull at Saylorville Reservoir in Polk County, IA on February 1, 1991.
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Dinsmore, Stephen J.
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Franklin's Gull
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Saylorville Lake
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Saylorville Reservoir, Polk Co.-at spillway below dam
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The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: The dark gray wings separated from the black wingtip by a white bar, broad white eye crescents, stocky bill lacking a pronounced gonys and rounder wings eliminate Laughing Gull. The combination of the black head and dark gray mantle eliminates other dark-headed gulls such as Bonaparte's and Common Black-headed gulls. | The original documentation form event lasted from 16:10:00/17:20:00.
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Iowa Ornithologists' Union | MS 166
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34
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32
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Rare bird documentation form for Franklin's Gull at Coralville Reservoir, 1990
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Field notes
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Birds--Identification Ornithology Rare birds
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1990-12-16
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Franklin's Gull at Coralville Reservoir in Johnson County, IA on December 16, 1990.
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Bendorf, Carl J.
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Franklin's Gull
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Coralville Lake
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Coralville Reservoir, Johnson County
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|
The documentation form by Carl J. Bendorf is the only one submitted and forms the basis of this record. Other observers include Thomas Kent, Randy Graesser, John Van Ryebroek, Carol Thompson, and Dick Tetrault. | Elimination of similar species: Laughing Gull: White in wingtips of adult gull doesn't fit. Bonaparte's Gull: Mantel color seemed too dark for adult bird and white tertial mark on mantel indicates a white trailing edge to wing which doesn't fit. Common Black-headed Gull: same problems as with Bonaparte's. | The original documentation form event lasted from 13:00:00/13:30:00.
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Iowa Ornithologists' Union | MS 166
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34
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32
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Rare bird documentation form for Laughing Gull at Babcock Access at Coralville Reservoir, 1999
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Field notes
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Birds--Identification Ornithology Rare birds
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1999-08-10
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Laughing Gull at Babcock Access at Coralville Reservoir in Johnson County, IA on August 10, 1999.
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Kent, Thomas H. (Thomas Hugh), 1934-
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Laughing Gull
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Babcock Access
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Babcock Access, Coraville Res., Johnson Co., Iowa
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Open, wide part of reservoir with mud flats.
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The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include James Huntington and Jim Fuller. | Elimination of similar species: 1st year Franklin's Gull has more pattern to wings and more extensive tail band. 2nd year Franklin's would have less black in outer wing and more of a half-[illegible]. This bird was not close enough to see the bill well on details on the tail band. | The original documentation form event lasted from 18:05:00/18:20:00.
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Iowa Ornithologists' Union | MS 166
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34
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31
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Rare bird documentation form for Laughing Gull at Sandpiper Recreation Area at Saylorville, 1999
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Field notes
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Birds--Identification Ornithology Rare birds
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1999-05-22
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N/A
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Rare birds documentation form
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Rare bird documentation form for two Laughing Gulls at Sandpiper Recreation Area at Saylorville in Polk County, IA on May 22, 1999.
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Engebretsen, Bery
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Laughing Gull
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Sandpiper Recreation Area
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Saylorville, parking lot at Sandpiper
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|
The documentation form by Bery Engebretsen is the only one submitted and forms the basis of this record. | Elimination of similar species: I could see both Laughing + Franklin's standing side by side. Laughing were clearly 20-25% larger, as was bill. A more prominent 'gonys' made the bill appear somewhat more hooked. In flight, the wing tips were black + more extensive than Franklins, both above + below. I looked carefully for any trace of white between tip + rest of wing, as well as for any white on the head, and there was none. The eye ring was broken on the front, less so in the back. The Franklin's had a rounder appearance to the head than did the Laughing. In flight, the Laughing's tail was pure white. | The original documentation form event lasted from 08:05:00/08:35:00.
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Iowa Ornithologists' Union | MS 166
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34
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31
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Rare bird documentation form for Red-necked Phalarope east of Colo, 1982.
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Field notes
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Birds--Identification Ornithology Rare birds
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1982-05-23
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N/A
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Rare birds documentation form
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Rare bird documentation form for three Red-necked Phalaropes east of Colo in Story County, IA on May 23, 1982.
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Martsching, Paul
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Red-necked Phalarope
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Colo
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pothole 2 1/2 miles East of Colo, Story Co, Iowa
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agriculture land - with 'trash' + 'stubble.' pothole
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The documentation form by Paul Martsching is the only one submitted and forms the basis of this record. Other observers include Mike Nolan. | Elimination of similar species: Wilson's Phalarope - does not have white stripe down wing. head not so dark. Sanderling has white stripe down wing - details seen when swimming rule it out. | The original documentation form event lasted from 16:00:00/16:30:00.
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Iowa Ornithologists' Union | MS 166
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34
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30
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Rare bird documentation form for Northern Phalarope at Coralville Reservoir in unknown year
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Field notes
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Birds--Identification Ornithology Rare birds
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N/A
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N/A
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Manuscript, graphic, and printed material
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Rare bird documentation form for a Northern Phalarope at Coralville Reservoir on or before November 20 in an unknown year.
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Newlon, Michael C.
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Red-necked Phalarope
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Coralville Lake
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|
|
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Iowa Ornithologists' Union | MS 166
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34
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30
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Rare bird documentation form for Wilson's Phalarope at Riverton Wildlife Area, 1991
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Field notes
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Birds--Identification Ornithology Rare birds
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1991-03-28
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Wilson's Phalarope at Riverton Wildlife Area in Fremont County, IA on March 28, 1991.
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Dinsmore, Stephen J.
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Wilson's Phalarope
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Riverton Wildlife Management Area
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Riverton W.A., Fremont Co., IA
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|
The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. Other observers include Tanya Bray. | Elimination of similar species: The body shape, bahavior, [sic] and plumage identify the bird as a phalarope. Bill shape eliminates other phalaropes, which would be even more unlikely on this date. | The original documentation form event lasted from 09:30:00/10:45:00.
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Iowa Ornithologists' Union | MS 166
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34
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29
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Rare bird documentation form for Wilson's Phalarope at Riverton Game Management Area, unknown year
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Field notes
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Birds--Identification Ornithology Rare birds
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N/A
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N/A
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Rare birds documentation form
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Rare bird documentation form for two Wilson's Phalaropes at Riverton Game Management Area in Fremont County, IA on July 15, unknown year.
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Silcock, W. Ross
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Wilson's Phalarope
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Riverton Wildlife Management Area
|
Riverton GMA, Fremont County
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It was feeding near the shoreline in dead weeds, mostly on foot, but occasionally in deeper water.
|
The documentation form by Ross Silcock is the only one submitted and forms the basis of this record. Other observers include Bob Myers and Francis Moore. | Elimination of similar species: Other species we considered (albeit briefly) were: Ruff: eliminated by bill size and shape (thin and straight, rather than fairly heavy and thick-based with a slight droop); also eliminated by phalarope feeding actions. Some far out of range Tringa (eg Wood Sandpiper or juv Redshank): legs relatively short; also phalarope feeding actions.
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Iowa Ornithologists' Union | MS 166
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34
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29
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Rare bird documentation form for Common Snipe at Washington Township, 1986
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Field notes
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Birds--Identification Ornithology Rare birds
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1986-06-12
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N/A
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Rare birds documentation form
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Rare bird documentation form for a Common Snipe at Washington Township in Winneshiek County, IA on June 12, 1986.
|
Dietzenbach, Mark A.
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Common Snipe
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Washington Township
|
County: Winneshiek Block: Not in survey block Location in detail: Washington Township, section one, two miles south of Calmar. One hundred yards west of Hwy 150 where it crosses concrete bridge.
|
Wet meadow, sedgy areas, low woody growth nearby, pasture.
|
The documentation form by Mark A. Dietzenbach is the only one submitted and forms the basis of this record. | Elimination of similar species: American Woodcock; not quite their normal habitat, Plumper, rounded wings, they produce a whisting [sic] sound when flushed. Upland Sandpiper: shorter bill, no stripes on head or back. | The original documentation form event lasted from 20:42:00/20:42:05.
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Iowa Ornithologists' Union | MS 166
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34
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27
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Rare bird documentation form for Long-billed Dowitcher at Swan Lake, 1994
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Field notes
|
Birds--Identification Ornithology Rare birds
|
1994-11-25
|
N/A
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Rare birds documentation form
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Rare bird documentation form for two Long-billed Dowitchers at Swan Lake in Johnson County, IA on November 25, 1994.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Long-billed Dowitcher
|
Swan Lake Wildlife Management Area
|
Swan L., Johnson Co., IA
|
small natural marsh with low water, mud flats, no vegetation
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. | Elimination of similar species: These birds did not have the bold streaking of a snipe. I wouldn't believe a Short-billed Dowitcher at this date if I saw it myself. At any rate, the gray neck and some retained thin rufous edge on wing feathers is typical of molting juvenile Long-billed Dowitcher at this date in Iowa. | The original documentation form event lasted from 15:45:00/16:10:00.
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Iowa Ornithologists' Union | MS 166
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34
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26
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