Rare bird documentation form for Greater Scaup at Coralville Reservoir, 1976
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1976-03-20
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Greater Scaup at Coralville Reservoir in Johnson County, IA on March 20, 1976.
|
Halmi, Nicholas S.
|
Greater Scaup
|
Coralville Lake
|
Coralville Reservoir, Johnson Co., Iowa, just NE of Mehaffey Bridge (rd F28)
|
swimming in water of reservoir, near the shore, in shallow water, then flew off into deeper central water
|
The documentation form by Nicholas Halmi is the only one submitted and forms the basis of this record. | Elimination of similar species: Lesser Scaup - several pairs nearby; Female in same scope field as gr. scaup: differences evident - L. Scaup showed purplish, not green, head gloss, slightly peaked head, daintier proportions, finer bill. | The original documentation form event lasted from 15:50:00/16:00:00.
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Iowa Ornithologists' Union | MS 166
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33
|
10
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Rare bird documentation form for Forster's Tern at Coralville Reservoir, 1983
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1983-10-21
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Forster's Tern at Coralville Reservoir in Johnson County, IA on October 21, 1983.
|
Peterjohn, Bruce G.
|
Forster's Tern
|
Coralville Lake
|
Coralville Reservoir, Johnson Co., Iowa
|
foraging over the open waters of the reservoir
|
The documentation form by Bruce Peterjohn is the only one submitted and forms the basis of this record. Other observers include Tom Kent, Carl Bendorf, Tom Staudt, and Rick Hollis. | Elimination of similar species: Common Tern was eliminated by flight pattern (more rapid + deeper wing beats) + apparent head pattern (Common Terns have more extensive black on the head). | The original documentation form event lasted from around 09:00:00/09:03:00.
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Iowa Ornithologists' Union | MS 166
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34
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43
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Rare bird documentation form for White-rumped Sandpiper at Coralville Reservoir, 1995
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1995-09-13
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a White-rumped Sandpiper at Coralville Reservoir in Johnson County, IA on September 13, 1995.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
White-rumped Sandpiper
|
Coralville Lake
|
Coralville Reservoir, Johnson Co., Iowa
|
backwater with mud flats
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. | Elimination of similar species: The size, elongated profile, and lack of sharp belly band but [sic] this bird in the category of Baird's or White-rumped Sandpiper. I have seen a number of Baird's at this location in the last few weeks. They were browner above and had a buffy breast. The streaks on the sides also suggested White-rumped. Having seen the white rump on two consecutive days convinced me of my first fall White-rumped Sandpiper for Iowa. | The original documentation form event lasted from 09:30:00/10:00:00 approximately.
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Iowa Ornithologists' Union | MS 166
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34
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21
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Rare bird documentation form for Western Sandpiper at Coralville Reservoir, 1992
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1992-08-22
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for two Western Sandpipers at Coralville Reservoir in Johnson County, IA on August 22, 1992.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Western Sandpiper
|
Coralville Lake
|
Coralville Reservoir, Johnson Co., Iowa
|
mud flat along waterway at upper part of reservoir.
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. | Elimination of similar species: The overall color made me think of Least Sandpiper first, but the legs were definitely black and the bill was more decurved than any Least Sandpiper I have seen. I have seen rather rufous appearing Semipalmated Sandpipers, but they looked much more uniform on the upper parts than this bird did. Also the bill was too curved for a semi. | The original documentation form event lasted from 09:30:00/09:35:00.
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Iowa Ornithologists' Union | MS 166
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34
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18
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Rare bird documentation form for Greater Scaup at Coralville Reservoir, 1977
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1977-03-22
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Greater Scaup at Coralville Reservoir in Johnson County, IA on March 22, 1977.
|
Halmi, Nicholas S.
|
Greater Scaup
|
Coralville Lake
|
Coralville Reservoir, Johnson Co., about 1/2 mile above dam
|
fresg\h water - reservoir lake
|
The documentation form by Nicholas S. Halmi is the only one submitted and forms the basis of this record. | Elimination of similar species: Lesser Scaups (several in same scope field): contrast in head shape, bill size, neck thickness clear; some of Lesser Scaups in vicinity had grayish smudged flanks rather than pure white of Greater Scaup. | The original documentation form event lasted from 16:20:00/16:35:00.
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Iowa Ornithologists' Union | MS 166
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33
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10
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Rare bird documentation form for Black-legged Kittiwake at Coralville Reservoir, 1976
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1976-10-27
|
1976-10-28
|
Rare birds documentation form
|
Rare bird documentation form for a Black-legged Kittiwake at Coralville Reservoir in Johnson County, IA on October 27, 1976.
|
Halmi, Nicholas S.
|
Black-legged Kittiwake
|
Coralville Lake
|
Coralville Reservoir, Johnson Co. Iowa
|
Over water. in a small inlet formed by the scalloped SW shore of the reservoir
|
The documentation form by Nicholas S. Halmi is the only one submitted and forms the basis of this record. Other observers include Mike Newlon, Carol Newlon, Rich DeCoster, Allan Mueller, Lillian Serbousek, and Weir Nelson. | Elimination of similar species: Bonaparte's has no nuchal crescent, more white on wings, square on rounded tail; Black-headed - ditto, with even more white on wings; Sabine's: no nuchal spot, wing pattern of black-gray-white triangles, head gray in back; Ross's - no nuchal crescent, wedge-shaped tail, no spot behind eye; Little - much smaller, nuchal crescent (if present) merely an extension of the dark gray back, not demarcated in white, black cap. Of these only the imm. Bonaparte's is more common than the Kittiwake in Iowa. This is the third record for the state (last seen in Davenport Dec. 1967). | The original documentation form event lasted from 16:20:00/16:40:00.
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Iowa Ornithologists' Union | MS 166
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34
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40
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Rare bird documentation form for Black-legged Kittiwake at Coralville Reservoir, 1996
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1996-11-25
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Black-legged Kittiwake at Coralville Reservoir in Johnson County, IA on November 25, 1996.
|
Edwards, Chris
|
Black-legged Kittiwake
|
Coralville Lake
|
Coralville Reservoir, Johnson Co.
|
Spillway below dam
|
The documentation form by Chris Edwards is the only one submitted and forms the basis of this record. Other observers include Ken Lowder and Tom Kent. | Elimination of similar species: The pattern of the upperparts is very distinctive. The black 'collar' eliminates similar species. | The original documentation form event lasted from 12:35:00/12:40:00.
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Iowa Ornithologists' Union | MS 166
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34
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40
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Rare bird documentation form for Peregrine Falcon at Coralville Reservoir, 1989
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1989-09-29
|
1989-11-25
|
Rare birds documentation form
|
Rare bird documentation form for a Peregrine Falcon at Coralville Reservoir in Johnson County, IA on September 29, 1989.
|
Newlon, Michael C.
|
Peregrine Falcon
|
Coralville Lake
|
Coralville Reservoir, Johnson Co, IA
|
field at edge of large reservoir floodplain
|
The documentation form by Mike Newlon is the only one submitted and forms the basis of this record. | Elimination of similar species: size, build, color, face pattern diagnostic. | The original documentation form event lasted from 09:00:00/09:20:00 and 12:30:00/12:40:00.
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Iowa Ornithologists' Union | MS 166
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33
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34
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Rare bird documentation form for White-winged Scoter at Coralville Reservoir, 1983
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1983-10-23
|
1983-11-29
|
Rare birds documentation form
|
Rare bird documentation form for a White-winged Scoter at Coralville Reservoir in Johnson County, IA on October 23, 1983.
|
Wilson, Barbara L.
|
White-winged Scoter
|
Coralville Lake
|
Coralville Reservoir, Iowa
|
|
The documentation form by Barbara L. Wilson is the only one submitted and forms the basis of this record. Other observers include Tanya Bray and Ross Silcock. | Elimination of similar species: Differs from most ducks by black color, + from the other scoters by white in wings + around eye. | The original documentation form event occurred around 14:10:00.
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Iowa Ornithologists' Union | MS 166
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33
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12
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Rare bird documentation form for Western Grebe at Sandy Beach Area at Coralville Reservoir, 1977
|
Field notes Forms (documents)
|
Birds--Identification Ornithology Rare birds
|
1977-10-27
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Western Grebe at Sandy Beach Area at Coralville Reservoir in Johnson County, IA on October 27, 1977.
|
Halmi, Nicholas S.
|
Western Grebe
|
Sandy Beach Public Use Area
|
Coralville Reservoir, E of Sandy Beach area, Johnson Co.
|
deep portion of reservoir
|
The documentation form by Nicholas Halmi is the only one submitted and forms the basis of this record. Other observers include Dr. Carter, Mike Newlon, Carol Newlon, Peter Petersen, and Mary Lou Petersen. | Elimination of similar species: Red-necked Grebe: smaller, shorter bill, ventral aspects of neck not slate but gray. Horned grebe (one nearby for direct comparison): much smaller, shorter neck and bill. White wing patch, not long stripe. | The original documentation form event lasted from 15:25:00/15:45:00.
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Iowa Ornithologists' Union | MS 166
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32
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15
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Rare bird documentation form for Mississippi Kite at Coralville Reservoir, 1990
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1990-05-19
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Mississippi Kite at Coralville Reservoir in Johnson County, IA on May 19, 1990.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Mississippi Kite
|
Coralville Lake
|
Coralville Reservoir, Babcock Access, Johnson Co., IA
|
wide part of reservoir with open mud flats
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. | Elimination of similar species: The pointed wings indicate a kite or falcon. The gliding flight was that of a kite not a falcon. The white body and head also eliminates all falcons. The lack of white rump as well as the flight pattern eliminate Northern Harrier. Swallow-tailed Kite would have a forked tail and different flight pattern. Black-shouldered Kite has a white tail and black shoulder. The lack of white patches in the secondaries and brownish tail indicate a subadult (first year bird). I looked for bands in the tail but could not appreciate them. Failure to see bands could be due to the lighting and distance or, as noted by Clark and Wheeler, to the fact that "A few immatures have solid, unbanded dark brown tails." The prominent light and dark underwing puzzled me, but Dunne says "Immature has body and underwing coverts buffy, with dark streaking and spotting of variable density; may be lighter or darker than illustrated." The underwing coverts and body appeared about the same shade to me. The lighting and distance may have precluded my appreciating any streaking. This bird appeared lighter than the bird I saw at Dudgeon Lake last year, especially the underwing coverts. The profile and flight characteristics allowed me to immediately recognize the bird as a Mississippi Kite. | The original documentation form event lasted from 13:35:00/13:36:00.
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Iowa Ornithologists' Union | MS 166
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33
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20
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Rare bird documentation form for Loggerhead Shrike at Coralville Reservoir west of Green Castle, 1978
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1978-12-19
|
1978-12-25
|
Rare birds documentation form
|
Rare bird documentation form for a Loggerhead Shrike at Coralville Reservoir west of Green Castle in Johnson County, IA on December 19, 1978.
|
Staudt, Thomas J.
|
Loggerhead Shrike
|
Green Castle (historical)
|
Coralville Reservoir west of Green Castle,
|
General: open country near river, scattered tree stands and individual trees. Specific: single bare tree at least 40yds from nearest trees.
|
The documentation form by Thomas J. Staudt is the only one submitted and forms the basis of this record. Other observers include Carol Newlon, Mona Brown, and Noel Brown. | Elimination of similar species: The obvious mask on this bird so contrasted with the mask on a Northern Shrike seen only a little over an hour earlier that this bird seemed to have to be a Loggerhead. also the point in the illustration that the mask seemed to go through the beak and across the upper mandible should eliminate an adult Northern. | The original documentation form event lasted from 09:30:00/10:00:00.
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Iowa Ornithologists' Union | MS 166
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34
|
74
|
Rare bird documentation form for White-winged Scoter at Coralville Reservoir, 1983
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1983-10-23
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a White-winged Scoter at Coralville Reservoir in Johnson County, IA on October 23, 1983.
|
Staudt, Thomas J.
|
White-winged Scoter
|
Coralville Lake
|
Coralville Reservoir Johnson Co.
|
|
The documentation form by Tom Staudt is the only one submitted and forms the basis of this record. | Elimination of similar species: No other water fowl has the combination of white facial spot, white speculum and otherwise complete black appearance. | The original documentation form lasted from 14:30:00 and 15:30:00.
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Iowa Ornithologists' Union | MS 166
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33
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12
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Rare bird documentation form for Harris' Sparrow at Coralville Reservoir, 1976
|
Field notes
|
Birds--Behavior Birds--Identification Birdsongs Ornithology Rare birds
|
1976-04-10
|
1976-04-11
|
Rare birds documentation form
|
Rare bird documentation form for two Harris' Sparrows at Coralville Reservoir in Johnson County, IA on April 10, 1976.
|
Newlon, Michael C.
|
Harris' Sparrow
|
Coralville Lake
|
Coralville Reservoir Iowa City, Iowa 52240
|
woodlot with tall trees, weed patches, brush pile, in an area of fields and second-growth woods.
|
The documentation form by Michael C Newlon is the only one submitted and forms the basis of this record. Other observers are unidentified in the documentation form. | Elimination of similar species: [...] large sparrow, built like a white-crown but larger, longer-tailed, posture less erect.
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Iowa Ornithologists' Union | MS 166
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35
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64
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Rare bird documentation form for Bald Eagle at Coralville Reservoir, 1979
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1979-08-04
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Bald Eagle at Coralville Reservoir in Johnson County, IA on August 4, 1979.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Bald Eagle
|
Coralville Lake
|
Coralville Reservoir Iowa
|
over wide area of reservoir - area with many dead trees - seen from sand point - 1 mile north of Swan Lake, Johnson Co, IA
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Nick Halmi and Tom Shires. | Elimination of similar species: Location of white areas do not fit immature Golden Eagle. Bald Eagles are commonly seen here in season. | The original documentation form event lasted from 14:30:00/14:40:00.
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Iowa Ornithologists' Union | MS 166
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33
|
21
|
Rare bird documentation form for Bald Eagle at Coralville Reservoir, 1992
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1992-05-30
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for two Bald Eagles at Babcock Access Rd. at Coralville Reservoir in Johnson County, IA on May 30, 1992.
|
Pinkston, Randall, 1956-
|
Bald Eagle
|
Coralville Lake
|
Coralville Reservoir from Babcock Access Rd., Johnson Co., Iowa
|
|
The documentation form by Randall Pinkston is the only one submitted and forms the basis of this record. Other observers include Bill Pinkston and Tom Kent. | Elimination of similar species: Adult unmistakeable. Golden Eagle (Aquila chrysaetos) the only other raptor of comparable size, immature with white restricted to base of primaries and base of tail, not usually expected in aquatic habitats. | The original documentation form event lasted from 11:10:00/11:30:00.
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Iowa Ornithologists' Union | MS 166
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33
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21
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Rare bird documentation form for Peregrine Falcon at Sand Point at Coralville Reservoir, 1977
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1977-05-03
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Peregrine Falcon at Sand Point at Coralville Reservoir in Johnson County, IA on May 3, 1977.
|
Halmi, Nicholas S.
|
Peregrine Falcon
|
Sand Point
|
Coralville Reservoir at Sandy Point, Johnson Co., Iowa
|
reservoir margin; flying over weedy point, then alighting in tree N of reservoir (very low, almost reduced to river channel)
|
The documentation form by Nicholas Halmi is the only one submitted and forms the basis of this record. | Elimination of similar species: Much larger than Merlin or Am. Kestrel; falcon shape; Mustache pattern diagnostic; shape excludes buteos etc. | The original documentation form event lasted from 16:15:00/16:40:00.
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Iowa Ornithologists' Union | MS 166
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33
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34
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Rare bird documentation form for White-winged Scoter at Coralville Reservoir, 1977
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1977-03-23
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for two White-winged Scoters at Coralville Reservoir in Johnson County, IA on March 23, 1977.
|
Halmi, Nicholas S.
|
White-winged Scoter
|
Coralville Lake
|
Coralville Reservoir about 0.5 mile up from dam
|
reservoir lake - Coralville Reservoir, deep portion
|
The documentation form by Nicholas S. Halmi is the only one submitted and forms the basis of this record. Other observers include Tom Shires, Robert Osmundson, Helen Osmundson, and Rich DeCoster. | Elimination of similar species: Other Scoters: prominent white speculum. Gadwall: different shape, black coloration of most of plumage. | The original documentation form event lasted from 16:25:00/16:40:00.
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Iowa Ornithologists' Union | MS 166
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33
|
12
|
Rare bird documentation form for Yellow Rail at Sugarbottom Recreation Area at Coralville Reservoir, 1991
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1991-09-22
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Yellow Rail at Sugarbottom Recreation Area at Coralville Reservoir in Johnson County, IA on September 22, 1991.
|
Pinkston, Randall, 1956-
|
Yellow Rail
|
Sugar Bottom Recreation Area
|
Coralville Reservoir (Sugarbottom recreation area..see map on back), Johnson Co., Iowa
|
|
The documentation form by Randall Pinkston is the only one submitted and forms the basis of this record. | Elimination of similar species: Large white wing patches are diagnostic. | The original documentation form event occurred around 12:30:00.
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Iowa Ornithologists' Union | MS 166
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33
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39
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Rare bird documentation form for Red-necked Grebe at Mehaffey Bridge at Coralville Reservoir, 1986
|
Field notes Forms (documents)
|
Birds--Identification Ornithology Rare birds
|
1986-11-15
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Red-necked Grebe at the Mehaffey Bridge at Coralville Reservoir in Johnson County, IA on November 15, 1986.
|
Fuller, James L
|
Red-necked Grebe
|
Mehaffey Bridge
|
Coralville Reservoir (Mehaffey Bridge Area)
|
Reservoir
|
The documentation form by Jim Fuller is the only one submitted and forms the basis of this record. Other observers include Charles Fuller. | Elimination of similar species: Horned Grebe - Larger size and not enough white on neck. Also shorter neck & bill & light bill color. Western Grebe - smaller size & not enough white on neck - Flanks were light. | The original documentation form event lasted from 07:30:00/07:45:00 and 09:20:00/09:30:00.
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Iowa Ornithologists' Union | MS 166
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32
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13
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Rare bird documentation form for Franklin's Gull at Jolly Rogers Campground at Coralville Reservoir, 1990
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1990-12-16
|
1990-12-18
|
Rare birds documentation form
|
Rare bird documentation form for a Franklin's Gull at Jolly Rogers Campground at Coralville Reservoir in Johnson County, IA on December 16, 1990.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Franklin's Gull
|
Jolly Rogers Campground
|
Coralville Reservoir (Jolly Roger), Johnson Co., IA
|
wide part of reservoir
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Carl Bendorf, Carol Thompson, and others. | Elimination of similar species: Bonaparte's [handwritten note - 'neither is Franklins!] not hooded at this time of year and has lighter wing with white leading edge. In the last several years, Franklin's Gulls in alternate plumage have been recorded in the midwest in winter. | The original documentation form event lasted from 13:30:00/13:45:00 estimate.
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Iowa Ornithologists' Union | MS 166
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34
|
32
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Rare bird documentation form for Bald Eagle at Hawkeye Wildlife Area, 1979
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1979-08-04
|
1979-08-07
|
Rare birds documentation form
|
Rare bird documentation form for a Bald Eagle at Hawkeye Wildlife Area near Coralville Reservoir in Johnson County, IA on August 4, 1979.
|
Shires, Thomas K.
|
Bald Eagle
|
Coralville Lake Hawkeye Wildlife Management Area
|
Coralville Reservoir (Hawkeye Wildlife Area)
|
Large flooded area (reservoir) filled with dead trees
|
The documentation form by Thomas K. Shires is the only one submitted and forms the basis of this record. Other observers include Tom Kent and Nicholas Halmi. | Elimination of similar species: Habitat, absence of strong white patch at base of upper primaries make it unlikely for it to be a Golden Eagle. | The original documentation form event lasted from 06:30:00/06:45:00.
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Iowa Ornithologists' Union | MS 166
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33
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21
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Rare bird documentation form for Wilson's Phalarope at Coralville Reservoir, 1997
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1997-10-17
|
1997-11-28
|
Rare birds documentation form
|
Rare bird documentation form for a Wilson's Phalarope at Coralville Reservoir in Johnson County, IA on October 17, 1997.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Wilson's Phalarope
|
Coralville Lake
|
Coralville Reservoir (Greencastle Ave.), Johnson Co., IA
|
old backwater now without trees, narrow mud flats
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Rita Goranson, Al Goranson, Jim Fuller, and John Rutenbeck. | Elimination of similar species: At first I thought the bird was a Wilson's, but the date seemed odd. However, the size, lack of back streaks, lack of dark auricular patch, and long thin bill eliminate Red-necked and Red phalaropes, both of which would be more likely at this date. | The original documentation form event lasted from 14:30:00/15:45:00.
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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 Least Sandpiper at Babcock Access at Coralville Reservoir, 1998
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1998-12-06
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Least Sandpiper at Babcock Access at Coralville Reservoir in Johnson County, IA on December 6, 1998.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Least Sandpiper
|
Babcock Access
|
Coralville Reservoir (Babcock Access), Johnson Co., IA
|
low water in field
|
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: Only size comparison with Killdeer - about 1/2 as long and 1/3 as big - crude estimate. | The original documentation form event lasted from 09:00:00/09:15:00.
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Iowa Ornithologists' Union | MS 166
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34
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19
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Rare bird documentation form for Thayer's Gull southeast of Jolly Roger Marina at Coralville Reservoir, 1993
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1993-12-19
|
N/A
|
Rare birds documentation form
|
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.
|
Pinkston, Randall, 1956-
|
Thayer's Gull
|
Jolly Rogers Campground
|
Coralville Reservoir (1/4 - 1/2 mile southeast of Jolly Roger Marina), Johnson County, Iowa
|
|
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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