Rare bird documentation form for Northern Goshawk at Sweet Marsh, 1981
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1981-12-19
|
1982-01-01
|
Rare birds documentation form
|
Rare bird documentation form for a Northern Goshawk at Sweet Marsh in Bremer County, IA on December 19, 1981.
|
Hays, Russell
|
Northern Goshawk
|
Sweet Marsh
|
Sweet Marsh (south side), Bremer County, Ia.
|
River bottom timber
|
The documentation form by Russell Hays is the only one submitted and forms the basis of this record. Other observers include Eleanor Corvin, Antoinette Camarata, and Bob Myers. | Elimination of similar species: Imm. Cooper's would not show eye stripe. | The original documentation form event lasted from 11:20:00/11:30:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
25
|
Records Committee review for rare bird sighting for Northern Hawk Owl at Waterloo, 1981
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1981-12-25
|
1993-08-16
|
Rare birds documentation form
|
Records Committee review for a Northern Hawk Owl at Waterloo in Black Hawk County, IA on December 25, 1981. Includes a record review document with votes, an article in Iowa Bird Life, an article in American Birds, summary of the review, and four documentation forms submitted to the committee.
|
Myers, Robert K.
|
Northern Hawk Owl
|
Waterloo
|
Waterloo, Iowa - Black Hawk County
|
River bottom Timber along Black Hawk Creek
|
The documentation form by Robert K. Myers forms the basis of this record. Other documentation forms by Francis Moore, Peter C. Petersen, and Thomas H. Kent were submitted. Other observers include Mary Lou Petersen, Lewis Blevins, Corey Blevins, Brian Blevins, and Fred Lesher. | Elimination of similar species: The long tail, horizontal barring of breast, yellow eyes, facial pattern and behavior eliminated all other possible owls. | The original documentation form event lasted from 16:00:00/16:50:00 and around 17:00:00.
|
Iowa Ornithologists' Union | MS 166
|
12
|
16
|
Rare bird documentation form for Northern Goshawk at Cedar Falls, 1981
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1981-12-26
|
1981-12-27
|
Rare birds documentation form
|
Rare bird documentation form for a Northern Goshawk at Cedar Falls in Black Hawk County, IA on December 26, 1981.
|
Myers, Robert K.
|
Northern Goshawk
|
Cedar Falls
|
Cedar Falls (Black Hawk County)
|
River bottom timber along Cedar Riv.
|
The documentation form by Robert K. Myers is the only one submitted and forms the basis of this record. Other observers include Francis Moore. | Elimination of similar species: Large size and white eyestripe and very fluffy under tail covets eliminated the Cooper's hawk. | The original documentation form event lasted from 11:40:00/12:00:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
25
|
Rare bird documentation form for Red-shouldered Hawk at Sweet Marsh, 1981
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1981-12-19
|
1981-12-26
|
Rare birds documentation form
|
Rare bird documentation form for a Red-shouldered Hawk at Sweet Marsh in Bremer County, IA on December 19, 1981.
|
Myers, Robert K.
|
Red-shouldered Hawk
|
Sweet Marsh
|
Sweet Marsh (south side), Bremer County
|
River bottom timber along Wapsipinicon River
|
The documentation form by Robert K. Myers is the only one submitted and forms the basis of this record. Other observers include Bill Watson. | Elimination of similar species: Broad-winged Hawk has banded tail but sizes wing pattern and date eliminated it. | The original documentation form event lasted from 12:45:00/13:00:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
26
|
Rare bird documentation form for Northern Goshawk at Sweet Marsh, 1981
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1981-12-19
|
1981-12-26
|
Rare birds documentation form
|
Rare bird documentation form for a Northern Goshawk at Sweet Marsh in Bremer County, IA on December 19, 1981.
|
Myers, Robert K.
|
Northern Goshawk
|
Sweet Marsh
|
Sweet Marsh (Bremer County)
|
River bottom Timber at south edge of marsh
|
The documentation form by Robert K. Myers is the only one submitted and forms the basis of this record. Other observers include Russell Hays, Eleanor Corvin, and Antoinette Camarata. | Elimination of similar species: The shape + size made the choice either goshawk or coopers hawk and the white crescent over the eye made the choice goshawk. | The original documentation form event lasted from 12:30:00/12:30:00.
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Iowa Ornithologists' Union | MS 166
|
33
|
25
|
Rare bird documentation form for Brewster's Warbler at Grammer Grove Wildlife Area, 1986
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1986-05-09
|
1986-05-15
|
Rare birds documentation form
|
Rare bird documentation form for a Brewster's Warbler at Grammer Grove Wildlife Area in Marshall County, IA on May 9, 1986.
|
Proescholdt, Beth
|
Vermivoras
|
Grammer Grove County Wildlife Area
|
Grammer Grove W.A., Marshall County
|
River bottom woodlands, in sapling
|
The documentation form by Beth Proescholdt is the only one submitted and forms the basis of this record. Other observers include Ramona Sommerlot. | Elimination of similar species: Blue-winged Warbler - this bird was all white below with broad yellow wingbars. Golden-winged - this bird didn't have a dark throat or ear patch. Tennesse - although this bird was white underneath it had a yellow forehead + wing bars. | The original documentation form event lasted from 08:00:00/08:01:00.
|
Iowa Ornithologists' Union | MS 166
|
35
|
17
|
Rare bird documentation form for Merlin at Grammer Grove, 1985
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1985-09-24
|
1985-10-01
|
Rare birds documentation form
|
Rare bird documentation form for a Merlin at Grammer Grove in Marshall County, IA on September 24, 1985.
|
Proescholdt, Beth
|
Merlin
|
Grammer Grove County Wildlife Area
|
Grammer Grove, north Marshall County
|
river bottom woods by Iowa River
|
The documentation form by Beth Proescholdt is the only one submitted and forms the basis of this record. | Elimination of similar species: Sharp-shin or Peregrine - Falcon shape so couldn't be sharp-shin - too small for Peregrine + didn't have helmet of Peregrine. | The original documentation form event lasted from 11:50:00/11:50:30.
|
Iowa Ornithologists' Union | MS 166
|
33
|
32
|
Rare bird documentation form for Merlin at Grammer Grove Wildlife Area, 1984
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1984-09-22
|
1984-10-01
|
Rare birds documentation form
|
Rare bird documentation form for a Merlin at Grammer Grove Wildlife Area in Marshall County, IA on September 22, 1984.
|
Proescholdt, Beth
|
Merlin
|
Grammer Grove County Wildlife Area
|
Grammer Grove Wildlife Area, n. Marshall County
|
river bottom woods, along Iowa River
|
The documentation form by Beth Proescholdt is the only one submitted and forms the basis of this record. Other observers include Mark Proescholdt. | Elimination of similar species: Kestrel or Sharp-shinned Hawk - falcon shape, not accipiter - + this bird had dark brown not rufous back + tail of a Kestrel, + it had banded tail + streaked undersides. | The original documentation form event lasted from 11:30:00/11:35:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
32
|
Records Committee review for rare bird sighting for Mountain Bluebird west of Squirrel Hollow County Park, 1994
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1994-03-06
|
1996-04-25
|
Rare birds documentation form
|
Records Committee review for two Mountain Bluebirds west of Squirrel Hollow County Park in Greene County, IA on March 6, 1994. Includes a record review document with votes and four documentation forms submitted to the committee.
|
Thelen, Rob
|
Mountain Bluebird
|
Squirrel Hollow County Park
|
Greene Co. 2 1/2 m. N of Int. P30 + E57, then 1/4 m W.
|
River bottom, pasture hillside with scattered Shrubs
|
The documentation form by Rob Thelen forms the basis of this record. Other documentation forms by Jim Fuller, Mark Proescholdt, and Ed Thelen were submitted. Other observers include Beth Proescholdt, Jane Fuller, Alicia Thelen, Melinda Thelen, Natasha Thelen, Gordon Thelen, and many unidentified other observers. | Elimination of similar species: Eastern Bluebird, Mt. Bluebird is all Blue | The original documentation form event lasted from 09:30:00/16:45:00.
|
Iowa Ornithologists' Union | MS 166
|
13
|
5
|
Rare bird documentation form for Golden Eagle at Pilot Township in Cherokee County, 1983
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1983-03-05
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Golden Eagle at Pilot Township in Cherokee County, IA on March 5, 1983.
|
Bierman, Dick
|
Golden Eagle
|
Pilot Township
|
Cherokee County, Pilot Township T91 R40 Section 16
|
River bottom, wooded flooding, upload timber and pasture also.
|
The documentation form by Dick Bierman is the only one submitted and forms the basis of this record. | Elimination of similar species: Dark phase redtail, immature bald eagle, dark phase rough legged hawk. | The original documentation form event lasted from 11:35:00/11:45:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
31
|
Records Committee review for rare bird sighting for Western Tanager near Swan Lake, 1994
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1994-04-25
|
1996-04-25
|
Rare birds documentation form
|
Records Committee review for a Western Tanager near Swan Lake in Johnson County, IA on April 25, 1994. Includes a record review document with votes, an article in Iowa Bird Life, and three documentation forms submitted to the committee.
|
Dankert, David L.
|
Western Tanager
|
Swan Lake
|
Coralville Reservoir, Johnson County
|
river bottomland
|
The documentation form by David L. Dankert forms the basis of this record. Other documentation forms by James Fuller and Thomas Kent were submitted. | Elimination of similar species: NONE | The original documentation form event lasted from 10:50:00/10:50:08.
|
Iowa Ornithologists' Union | MS 166
|
13
|
29
|
Rare bird documentation form for Golden Eagle near Washta on the Little Sioux River, 1985
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1985-02-17
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Golden Eagle near Washta on the Little Sioux River in Cherokee County, IA on February 17, 1985.
|
Bierman, Dick
|
Golden Eagle
|
Washta
|
T90N R41W section 21 Cherokee County 2 miles northeast of Washta along the Little Sioux River
|
River bottomland woods mixed with pasture.
|
The documentation form by Dick Bierman is the only one submitted and forms the basis of this record. Other observers include Jim Huber, Marion Brewer, and Vernon Bierman. | Elimination of similar species: Immature Bald Eagle. Dark phase Redtail or Roughleg. | The original documentation form event lasted from 10:15:00/10:30:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
31
|
Rare bird documentation form for Lesser Black-backed Gull at Mississippi River between Bettendorf, IA and Moline, IL, 1992
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1992-01-11
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Lesser Black-backed Gull at Mississippi River between Bettendorf in Scott County, IA and Moline in Rock Island County, IL on January 11, 1992.
|
Petersen, Peter C.
|
Lesser Black-backed Gull
|
Bettendorf Moline
|
Miss. R. between Bettendorf + Moline, Scott + R.I. Cos.
|
river channel
|
The documentation form by Peter C. Petersen is the only one submitted and forms the basis of this record. | Elimination of similar species: Great Black-backed - back not black, too small. Slaty-backed - a bit small, trailing edge of wing with narrow, not wide, white edge. Western - a bit small bill not larger + heavier than the several nearby Herrings. | The original documentation form event lasted from 08:50:00/09:00:00.
|
Iowa Ornithologists' Union | MS 166
|
34
|
36
|
Rare bird documentation form for Black-legged Kittiwake at Red Rock Dam, 1988
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1988-12-14
|
1988-12-25
|
Rare birds documentation form
|
Rare bird documentation form for a Black-legged Kittiwake at Red Rock Dam in Marion County, IA on December 14, 1988.
|
Proescholdt, Mark
|
Black-legged Kittiwake
|
Red Rock Dam
|
Below Red Rock Reservoir dam - (Marion Co.)
|
River channel just below dam
|
The documentation form by Mark Proescholdt is the only one submitted and forms the basis of this record. Other observers include Beth Brown, Ann Johnson, Eugene Armstrong, and Eloise Armstrong. | Elimination of similar species: No gull quite looks like this. A first-year Little Gull has a black bar over its nape also, but has a dark cap on its head. | The original documentation form event lasted from 11:50:00/13:30:00.
|
Iowa Ornithologists' Union | MS 166
|
34
|
40
|
Rare bird documentation form for Ibis species at Cedar River at Nashua, 1984
|
Field notes Forms (documents)
|
Birds--Identification Ornithology Rare birds
|
1984-09-29
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for an Ibis species at Cedar River at Nashua in Chickasaw County, IA on September 29, 1984.
|
Dinsmore, Stephen J.
|
Glossy Ibises
|
Nashua
|
flying down Cedar River, Nashua, Chickasaw County
|
River channel with lots of mudflats and marshy areas nearby
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Beth Proescholdt and Mark Proescholdt. | Elimination of similar species: Separated from other herons by the uniformly dark colored body and the long dark decurved bill. | The original documentation form event lasted from 15:50:00/15:52:00.
|
Iowa Ornithologists' Union | MS 166
|
32
|
24
|
Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 19 at Keokuk, 1991
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1991-02-16
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Lock and Dam 19 at Keokuk in Lee County, IA on February 16, 1991. Includes a record review document with votes and a documentation form submitted to the committee.
|
Allen, Reid I.
|
Thayer's Gull
|
Lock Number 19
|
Lock & Dam #19 - Keokuk, Iowa
|
River channel with open water below dam extending 3/4 mile from dam
|
The documentation form by Reid Allen is the only one submitted and forms the basis of this record. Other observers include Pam Allen, Eugene Armstrong, and Eloise Armstrong. | Elimination of similar species: First-winter Herring gulls (many were present) had blackish wingtips. Juvenile Iceland gull wingtips lack dark edging on primaries as do those on Glaucous-winged Gull. | The original documentation form event lasted from approximately 10:30:00/10:50:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
Rare bird documentation form for Osprey at the Mississippi River near Davenport, 1992
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1992-12-20
|
1992-12-25
|
Rare birds documentation form
|
Rare bird documentation form for Osprey at the Mississippi River near Davenport in Scott County, IA on December 20, 1992.
|
Sandvick, Doris
|
Osprey
|
Davenport
|
Iowa side of Mississippi River from Rock Island IL.
|
River edge - in a cottonwood
|
The documentation form by Doris Sandvick is the only one submitted and forms the basis of this record. Other observers include Carol Rogers. | Elimination of similar species: Red-tailed Hawk - this bird too large, back entirely dark brown, top of head white. | The original documentation form event lasted from 09:40:00/09:45:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
19
|
Rare bird documentation form for Cattle Egret at Des Moines River Valley at Saylorville Lake, 1984
|
Field notes Forms (documents)
|
Birds--Identification Ornithology Rare birds
|
1984-08-02
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Cattle Egret at Des Moines River Valley at Saylorville Lake in Polk County, IA on August 2, 1984.
|
Engebretsen, Bery
|
Cattle Egret
|
Saylorville Lake
|
DsM river valley, S.P. Saylorville Lake, along NW 26th St.
|
river flood plain, open small, permanent pool with reedy shore, surrounded by short grass
|
The documentation form by Bery Engebretsen is the only one submitted and forms the basis of this record. | Elimination of similar species: Little blue and snowy have dark bills. | The original documentation form event lasted from 18:05:00/18:15:00.
|
Iowa Ornithologists' Union | MS 166
|
32
|
21
|
Rare bird documentation form for Greater Scaup at Saylorville Lake, 1988
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1988-11-20
|
1988-11-27
|
Rare birds documentation form
|
Rare bird documentation form for two Greater Scaups at Saylorville Lake in Polk County, IA on November 20, 1988.
|
Thomas, Michael K.
|
Greater Scaup
|
Saylorville Lake
|
Highway 17 and Des Moines River - North end of Saylorville Lake - Polk Co., IA
|
river flowing into Saylorville lake, fairly shallow, and plants on both sides
|
The documentation form by Mike Thomas is the only one submitted and forms the basis of this record. Other observers include Ann Johnson. | Elimination of similar species: Lesser scaup (size, head shape, head color on male, whiter sides on male in direct comparison to lesser scaups. Side by side comparison with lesser scaup was thankfully easy. The male's rounded head contrasted clearly with the more pointed heads of the lesser scaup. Also, the dark green head of male was visible. The male birds sides were whiter than male lesser scaup's sides and the difference in size was noticeable. | The original documentation form event lasted from 15:45:00/16:15:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
10
|
Records Committee review for rare bird sighting for Great Black-backed Gull east of Lock and Dam 15 in Davenport, 1988
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-12-18
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review for a Great Black-backed Gull at Lock and Dam 15 in Davenport in Scott County, IA on December 18, 1988. Includes a record review document with votes and two documentation forms submitted to the committee.
|
Petersen, Peter C.
|
Great Black-backed Gull
|
Lock and Dam 15
|
Missisippi River just E (upstream) of Lock 15 in Davenport
|
river ice
|
The documentation form by Peter C. Petersen is the earliest and the one that forms the basis of this record. Another documentation form by Jim Fuller was submitted later. Other observers include Mary Lou Petersen, Walter Zuurdeeg, Ann Barker, and Don Moeller. | Elimination of similar species: Lesser Black-backed Gull - this bird too large, mantle color too dark, legs color was pink, not yellow. | The original documentation form event lasted from 11:40:00/11:50:00 and 13:00:00/13:05:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
8
|
Records Committee review for rare bird sighting of Lesser Black-backed Gull at Davenport, 1991
|
Administrative records Clippings (information artifacts) Field notes Charts (graphic documents)
|
Bird watching Ornithology Ornithology--Societies, etc
|
1991-01-16
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review for a Lesser Black-backed Gull at Davenport in Scott County, IA on January 16, 1991. Includes a record review document with votes, an article in Iowa Bird Life, comparisons of different gull sightings, and a documentation form submitted to the committee.
|
Armstrong, Eloise Armstrong, Eugene
|
Lesser Black-backed Gull
|
Davenport
|
Sand Bar, Center Mississippi river Davenport
|
River Partly Frozen
|
The documentation form by Eugene Armstrong and Eloise Armstrong is the only one submitted and forms the basis of this record. Other observers include Peter C. Petersen, Tom Kent, and James Fuller. | Elimination of similar species: Herring - slightly smaller than herring Ring billed - larger than ring billed Glaucous - much larger than bird seen Great Black Backed - much smaller than great Black Backed Bird was standing + sitting with Ring Bill on left and Herring on right | The original documentation form event lasted from 15:00:00/15:20:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
5
|
Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 19, 1986
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-12-17
|
1994-11-04
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Lock and Dam 19 in Keokuk in Lee County, IA on December 17, 1986. Includes a record review document with votes, summary of review, and a documentation form submitted to the committee.
|
Cecil, Robert I.
|
Thayer's Gull
|
Lock Number 19
|
Lock and Dam 19, Keokuk, Lee Co., Iowa
|
River Rapids
|
The documentation form by Robert Cecil is the only one submitted and forms the basis of this record. Another observer includes Francis L. Moore. | Elimination of similar species: Herring Gull:Bill size, pattern of wingtips on upper and under surface of wings. Ringbill: size. Kumlien's Iceland: black rather than gray in wintip [sic] (Tom Kent, personal communication). Adult Glaucous has no black in wingtips. | The original documentation form event occurred at various times on the various dates listed on the documentation form.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
Rare bird documentation form for Glaucous Gull at Lock and Dam 19 at Keokuk, 1985
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1985-01-09
|
1985-01-10
|
Rare birds documentation form
|
Rare bird documentation form for Glaucous Gull at Lock and Dam 19 at Keokuk in Lee County, IA on January 9 ,1985 and January 10, 1985.
|
Cecil, Robert I.
|
Glaucous Gull
|
Lock Number 19
|
Tailrace behind Mississippi River dam at Keokuk, Iowa
|
River Rapids
|
The documentation form by Robert I. Cecil is the only one submitted and forms the basis of this record. | Elimination of similar species: White wingtips ruled out Herring Gull. | The original documentation form event lasted from 12:45:00/13:10:00 on January 9, 1985.
|
Iowa Ornithologists' Union | MS 166
|
34
|
37
|
Records Committee review for rare bird sighting of Lesser Black-backed Gull at Lock and Dam 19 in Keokuk, 1986
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-10-20
|
1993-09-07
|
Rare birds documentation form
|
Records Committee for a Lesser Black-backed Gull at Lock and Dam 19 in Keokuk in Lee County, IA on October 20, 1986. Includes a record review document with votes, an article in Iowa Bird Life, summary of the review, and two documentation forms submitted to the committee.
|
Cecil, Robert I.
|
Lesser Black-backed Gull
|
Lock Number 19
|
Behind dam, Lock and Dam 19, Keokuk, Iowa
|
River rapids
|
The documentation form by Robert Cecil forms the basis of this record. Another documentation form by Jim Fuller was submitted. Other observers include Chris Pilliod, Jim Sandrock, Cal Knight, Jane Fuller, Charles Fuller, and James Huntington. | Elimination of similar species: The only species I could not eliminate on the basis of field marks observed was Yellow-footed, which according to Tom Kent (telephone conversation) is not a known vagrant. More objectively, the Yellow-footed is supposed to be larger than a Herring Gull. As stated above, this bird was about the size of a Herring Gull, or perhaps a little smaller. I don't feel it was larger than a Herring Gull. Seabirds (Harrison) warns of possible confusion with dark race Herring Gull. I have not heard of this race occuring [sic] in Iowa. In any event, the foot coloring was incorrect for Herring Gull, which has pink legs in contrast to this bird's yellow legs. | The original documentation form event occurred at various times.
|
Iowa Ornithologists' Union | MS 166
|
11
|
5
|
Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 19, 1986
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-12-21
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Lock and Dam 19 in Keokuk in Lee County, IA on December 21, 1986. Includes a record review document with votes, a summary of the review, and a documentation form submitted to the committee.
|
Cecil, Robert I.
|
Thayer's Gull
|
Lock Number 19
|
Lock and Dam 19, Miss. River, Keokuk, Lee Co, Iowa
|
River rapids.
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The documentation form by Robert Cecil is the only one submitted and forms the basis of this record. Another observer includes Doug Reeves. | Elimination of similar species: First year Herring much more "contrasty"--see above. Kumlien's Iceland Gull...According to Seabirds (Harrison), 1st year Iceland is more pale, tail uniform gray. Overall body coloration is more like 1st year Glaucous--bird I saw was darker than 1st year Glaucous. [...] The important thing about this uniformity that the accompanying first year Herring Gulls had much contrast, showing whitish head, darker wingtips, dark at the tip of the underwings (sometimes), and most obviously, much darker secondaries, creating a dark trailing edge to the wings. Their general color was a darker chocolatey brown. [...] BILL: Pinkish--noticably [sic] smaller that [sic] Herrings. This is pretty subjective, but at about 2/3 of the way across the river at the dam (maybe one third mile) the bill on a Herring can be easily seen through my scope. [...] A very indistinct darkening (wing, upper surface) of the first two or three primaries. The mark had to be looked for to be seen--on the Herring it was much more evident. [...] At some times, the bird showed secondaries that were slightly darker than the rest of the wing. Slightly should be emphasized--at no time was it even close to the darkness of the secondaries of the first year Herring. [...] There was a very slight and indistinct darkening to the first two or three primaries, but this had to be looked for carefully. I have also seen a number of 1st year Herring Gulls that fit this description, but all have a distinct window at base of primaries. | The original documentation form event occurred at various times during the date range of sightings on the documentation form.
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Iowa Ornithologists' Union | MS 166
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11
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3
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