|
Records Committee review for rare bird sighting of Snowy Plover at Riverton Wildlife Management Area, 1992
|
Administrative records Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1992-05-10
|
1994-10-18
|
Rare birds documentation form
|
Records Committee review of a Snowy Plover at Riverton Wildlife Management Area in Fremont County, IA on May 10, 1992. Includes a record review document with votes, two photographs, and four documentation forms submitted to the committee.
|
Rose, Douglas L.
|
Snowy Plover
|
Riverton Wildlife Management Area
|
Riverton W.M.A, Fremont County Iowa
|
Mud Flats
|
The documentation form by Doug Rose is the earliest and the one that forms the basis of this record. Other documentation forms by B.J. Rose, Pam Allen, and Thomas H. Kent were submitted later. Other observers include Babs Padelford, Ross Silcock, Reid Allen, Ann Johnson, and Richard Tetrault. | Elimination of similar species: Semi-Palm + Piping - Both have crane legs This bird had all blk all black bill smaller size | The original documentation form event lasted from 17:00:00/17:30:00.
|
Iowa Ornithologists' Union | MS 166
|
9
|
18
|
|
Records Committee review for rare bird sighting of Snowy Plover east of Black Hawk Lake, 1997
|
Administrative records Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1997-06-14
|
2000-11-24
|
Rare birds documentation form
|
Records Committee review of a Snowy Plover east of Black Hawk Lake in Sac County, IA on June 14, 1997. Includes a record review document with votes, two photos, and two documentation forms submitted to the committee.
|
Allen, Pam
|
Snowy Plover
|
Black Hawk Lake
|
Sac County, in a dredge pond just east of the most easterly edge of Black Hawk Lake.
|
The bird was observed feeding quite near the edge of water and near shore area of the dredge pond which was mostly gumbo-like mudflats with some grassy patches.
|
The documentation form by Pam Allen is the earliest and the one that forms the basis of this record. Another documentation form by Peter Ernzen was submitted later. Other observers include Reid Allen, Rob Thelen, and Joe Clark. | Elimination of similar species: See above description. [...] It was about one-third the size of a Kildeer, with a short, thin pointed black bill (longer, however, than a Piping Plover's stubbier short bill). [...] Also conspicuous was the black patch which was located just at the top of the 'shoulder' where the wing joined the body and extending a little ways toward the mid-breast area (but nowhere extending as far as the complete or semi-complete breastband common on the Piping Plover). The legs and feet were a dull dark slate grey (with no hint of the orange/pink coloration indicative of a Piping Plover). | The original documentation form event lasted from 13:10:00/13:20:00 and 14:00:00/14:15:00.
|
Iowa Ornithologists' Union | MS 166
|
9
|
18
|
|
Records Committee review for rare bird sighting of Snowy Plover north of Burlington, 1990
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1990-04-28
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review of a Snowy Plover north of Burlington in Des Moines County, IA on April 28, 1990. Includes a record review document with votes and a documentation form submitted to the committee.
|
Fuller, Charles R.
|
Snowy Plover
|
Burlington
|
Highway 99 2 miles north of Burlington, Water Treatment Plant Pond
|
Water edge of settling pond
|
The documentation form by Chuck Fuller is the only one submitted and forms the basis of this record. | Elimination of similar species: Piping Plover--See above description Bill-size and color Legs--color Smudge behind eye Absence of a white rump. | The original documentation form event lasted from 16:45:00/19:00:00.
|
Iowa Ornithologists' Union | MS 166
|
9
|
18
|
|
Records Committee review for rare bird sighting of South Polar Skua at Credit Island, 1995
|
Administrative records Clippings (information artifacts) Correspondence Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1995-04-02
|
2000-11-22
|
Rare birds documentation form
|
Records Committee review for a South Polar Skua at Credit Island in Scott County, IA on April 2, 1995. Includes a record review document with votes, three different copies of a photograph, an article in American Birds, an article in Birds of Missouri, correspondence about the sighting, a documentation form, and an audiotape transcription submitted to the committee.
|
Hodges, Herbert James
|
South Polar Skua
|
Credit Island
|
Credit Island, Davenport, IA.
|
frozen harbor off Miss. River
|
The documentation form by Jim Hodges is the only one submitted and forms the basis of this record. | Elimination of similar species: No Jaeger or Gull has a comparable white streak down the primary bases into the secondaries. Lack of a dorsal view made species id. impossible. | The original documentation form event occurred around 09:30:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
14
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Bettendorf, 1989
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-02-18
|
1993-08-05
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Bettendorf in Scott County, IA on February 18, 1989. Includes a record review document with votes and a documentation form submitted to the committee.
|
Johnson, Ann
|
Thayer's Gull
|
Bettendorf
|
Mississippi River, Bettendorf, Scott Co., IA
|
seen from shore just south of I80 in area of cabins
|
The documentation form by Ann Johnson is the only one submitted and forms the basis of this record. | Elimination of similar species: The primary identification was done through the size and shape of the head. The bird was lighter in color than the first-winter herring gulls in the same area and the wing pattern on both upper and lower sides eliminated herring, ring-billed and Iceland gulls. | The original documentation form event lasted from 12:42:00/12:42:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Coralville Dam, 1981
|
Administrative records Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1981-11-07
|
1993-08-26
|
Rare birds documentation form
|
Records Committee review for two Thayer's Gulls at Coralville Dam in Johnson County, IA on November 7, 1981. Includes a record review document with votes, correspondence and commentary about the sighting, and a documentation form submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Thayer's Gull
|
Coralville Dam
|
Coralville Res. Dam, west overlook, Johnson Co. Iowa
|
Reservoir, just above dam, in water and on swimming beach
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Carl Bendorf, Mike Newlon, and many unidentified other observers. | Elimination of similar species: Photographs taken at the first encounter with a Celestron 750 mm lens demonstrate the size difference, the bill and head shape difference, the lighter overall color, and the window in the wing. An adult Herring was in the photo with the Thayer's on 7 Nov and imm Herring were photographed on 10 Nov for comparison. | The original documentation form event lasted from 09:25:00/09:50:00 and 11:00:00/11:20:00 on November 7, 1981 and 07:30:00/08:30:00 on November 8, 1981.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Coralville Dam, 1981
|
Administrative records Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1981-11-08
|
1993-08-26
|
Rare birds documentation form
|
Records Committee review for three Thayer's Gulls at Coralville Dam in Johnson County, IA on November 8, 1981. Includes a record review document with votes, correspondence and commentary about the sighting, summary of the review, and a documentation form submitted to the committee.
|
Moore, Francis L.
|
Thayer's Gull
|
Coralville Dam
|
Coralville Reservoir
|
Open wate [sic] near small sandy beach near the Dam area, Johnson County
|
The documentation form by Francis L. Moore is the only one submitted and forms the basis of this record. Other observers include Russell Hays, Tom Kent, Tom Shires, Tom Staudt, and many unidentified other observers. | Elimination of similar species: Ring-billed Gull and Herring Gull, see above. The Ring-billed Gulls were seen in direct contrast to these three birds and were definitely much smaller birds. The Herring Gulls (first year birds) that I have seen have more of a contrast between the rump and back and upper wing surfaces and none that I remember showed the whitish trailing edge on the tail. [...] The three birds seen were about the size of Herring Gulls in typical first year plumage. They were obviously large gulls of the genus Larus with a noticeably larger size than the Ring-billed Gulls and one Bonaparte's Gull that were next to the three larger birds. [...] There were no Herring Gulls nearby with which to make a comparison of size and coloration. The bills of all three gulls were black did not seem as heavy or bulky as the bill of a Herring Gull. | The original documentation form event lasted from 08:10:00/09:30:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Coralville Dam, 1981
|
Administrative records Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1981-12-06
|
1993-08-26
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Coralville Dam in Johnson County, IA on December 6, 1981. Includes a record review document with votes, correspondence and commentary about the sighting, field notes, and a documentation form submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Thayer's Gull
|
Coralville Dam
|
Coralville Res. Dam, Johnson Co., Iowa
|
Reservoir just above dam on ice
|
The documentation form by Thomas H. Kent as dictated to Carl Bendorf is the only one submitted and forms the basis of this record. Another observer was Carl Bendorf. | Elimination of similar species: imm. Herring Gull. The second year Herring has a light bill with black tip and more contrasting black and white pattern to wings and tail. The first year Herring is much darker, has a more bulbous, hooked bill, and lacks the definitewhite [sic] window in flight. | The original documentation form event lasted from 08:15:00/08:30:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Cottonwood Recreation Area near Saylorville Dam, 1986
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-12-03
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review of a Thayer's Gull at Cottonwood Recreation Area near Saylorville Dam in Polk County, IA on December 3, 1986. Includes a record review document with votes and a documentation form submitted to the committee.
|
Petersen, Peter C.
|
Thayer's Gull
|
Cottonwood Recreation Area
|
Cottonwood Rec. Area below Saylorville Dam. Polk Co
|
|
The documentation form by Peter C. Petersen is the only one submitted and forms the basis of this record. Other observers include Beth Proescholdt, Mark Proescholdt, Steve Dinsmore, Gil Sandvick, and unidentified other observers. | Elimination of similar species: [...] Birds call not distinguishable from Ring-billed Gulls feeding with it. [...] Herring Gull eliminated by lack of sharp contrast between primaries + remainder of mantle + back and whitish undersides of primaries. | The original documentation form event lasted from 10:02:00/10:03:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Credit Island, 1989
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-11-24
|
1993-08-06
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Credit Island in Scott County, IA on November 24, 1989. Includes a record review document with votes and a documentation form submitted to the committee.
|
Petersen, Peter C.
|
Thayer's Gull
|
Credit Island
|
Credit Island harbor
|
ice covered Miss. River backwater
|
The documentation form by Peter C. Petersen is the only one submitted and forms the basis of this record. Other observers include Jim Fuller, Brian Blevins, Corey Blevins, Lewis Blevins, Thomas H. Kent, John Daniels, and Ken Lowder. | Elimination of similar species: Herring Gull - dark brown primary tips, lacked silvery below wings. lack smudge on head | The original documentation form event lasted from 08:45:00/08:50:00 and 15:30:00/15:45:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at IPL Ponds in Pottawattamie County, 1989
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-10-29
|
1993-08-06
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at IPL Ponds in Pottawattamie County, IA on October 29, 1989. Includes a record review document with votes and three documentation forms submitted to the committee.
|
Grenon, Alan G.
|
Thayer's Gull
|
MidAmerican Energy Ponds
|
Iowa, Pottawattamie County, south of Council Bluffs, the north pond of the Iowa Power and Light plant's ponds, two miles north of the county line (three miles north of the Bellevue exit on I-29), just east of Interstate highway 29.
|
|
The documentation form by Alan G. Grenon forms the basis of this record. Other documentation forms by Babs Padelford and Ross Silcock were submitted. Other observers include B.J. Rose, Doug Rose, Loren Padelford as well as four unidentified observers. | Elimination of similar species: The most likely similar species are Iceland and Herring Gulls. Iceland Gull (first winter) is eliminated by the combination of the following characters: wing-tip darker than body at rest; wing-tip and secondaries darker above than remainder of wing; tail marked above by a darker band covering most of the distal portion; a possible darker area around the eye. Herring Gull (first winter) is eliminated by the combination of the following characters: wing-tip at rest brown-tan, not black; wing-tip and secondary bar tan in flight, not black; primaries with thin, pale tips; tail bar tan, not black; bill all dark; bill and head delicate; bill thin. Glaucous Gull would have been larger relative to Ring-billed Gulls, with a massive bill light with a dark tip, large head, and wing-tips and secondaries would not have been darker than other upper parts. California Gull (first winter) would have black or near-black primaries, secondaries, tail, and a mostly pale bill with a black tip. Glaucous-winged Gull and hybrids thereof eliminated by bill and head structure and body size all smaller/finer in this bird, tail and wing pattern. AG. | The original documentation form event occurred around 09:30:00 on October 29, 1989, from 11:30:00/12:15:00 and around 14:00:00 on the October 30, 1989.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Island View Park at Rathbun Reservoir, 1986
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-12-20
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for three Thayer's Gulls at Island View Park at Rathbun Reservoir in Appanoose County, IA on December 20, 1986. Includes a record review document with votes, a summary of the review, and two documentation forms submitted to the committee.
|
Dinsmore, Stephen J.
|
Thayer's Gull
|
Island View Park
|
Rathbun Reservoir, Appanoose Co. (Island View East and West Areas)
|
sitting on ice and feeding on open water with other gulls
|
The documentation form by Steve Dinsmore forms the basis of this record. Another documentation form by Ray Cummins was submitted. Another observer includes Randy Strough. | Elimination of similar species: The first-year birds were separated from first-year Iceland Gull by the distinct tail band and the darker primaries and from first-year Herring Gull by head shape, bill size, more uniform body color, and the silvery-white underwing. The adult bird was separated from an adult Iceland Gull by size, bill shape, and more black (still not too much, though) in the wingtips and from an adult Herring Gull by head shape, bill size, and paler wingtips. | The original documentation form event lasted from 10:05:00/10:30:00 and 13:30:00/13:54:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Lake Manawa, 1981
|
Administrative records Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1981-12-05
|
1993-08-26
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Lake Manawa in Pottawattamie County, IA on December 5, 1981. Includes a record review document with votes, correspondence and commentary about the sighting, and a documentation form submitted to the committee.
|
Silcock, W. Ross
|
Thayer's Gull
|
Lake Manawa
|
Lake Manawa
|
|
The documentation form by W. Ross Silcock is the only one submitted and forms the basis of this record. | Elimination of similar species: [...] Smaller than adult Herring Gull (winter plumage, red spot end of lower mandible) beside it, legs a little pinker. Larger than Ring-billed Gulls- flock of 14 adjacent. [...] Headmuch [sic] smaller relative to body than in the Herring Gull- also flatter-appearing. [...] 1. Bill was black (or very dark); this , combined with the rather pale underparts relative to the rest of the (also rather pale) plumage tends to rule out a first year Herring Gull. 2. Bill and head size and shape were not as heavy-appearing as in Herring Gull. Direct comparison with adjacent adult Herring Gull was very useful in deciding this. [...] 5. Size and pinker legs than Herring Gull are not sure characters, but lend support to identification as Thayer's Gull.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Lake Manawa, 1981
|
Administrative records Clippings (information artifacts) Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1981-03-19
|
1993-08-26
|
Rare birds documentation form
|
Records Committee review for two Thayer's Gulls at Lake Manawa in Pottawattamie County, IA on March 19, 1981. Includes a record review document with votes, correspondence and comments about the sighting, an article in Iowa Bird Life, and four documentation forms submitted to the committee.
|
Silcock, W. Ross
|
Thayer's Gull
|
Lake Manawa
|
Lake Manawa, Pottawattamie County, Iowa.
|
|
The documentation form by Ross Silcock is the earliest and the one that forms the basis of this record. Other documentation forms by Thomas H. Kent, Peter C. Petersen, and Robert K. Myers were submitted later. Other observers include Tom Shires, James Kovanda, Sandra Kovanda, Tanya Bray, Babs Padelford, Loren Padelford, B.J. Rose, and four unidentified other observers. | Elimination of similar species: The above description separates by direct comparison first-year Thayer's and Herring Gulls, the most similar species present. Thayer's may be confused in first year plumage with Kumlien's form of Iceland Gull, but the Thayer's had primaries slightly darker than the mantle (from above), whereas the opposite occurs in Iceland Gull (Lehman). Lehman also notes that some first-year Western Gulls may show translucent primaries from below in certain light, but these observations took place in excellent light at fairly close range. | The original documentation form event lasted from approximately 09:30:00/11:00:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Lock 15 in Davenport, 1986
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-12-24
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Lock 15 in Davenport in Scott County, IA on December 24, 1986. Includes a record review document with votes and a documentation form submitted to the committee.
|
Petersen, Peter C.
|
Thayer's Gull
|
Lock and Dam 15
|
Lock 15, Davenport
|
General: Mississippi River Specific: just below roller dam
|
The documentation form by Peter C Petersen is the only one submitted and forms the basis of this record. Other observers include Tim Dwyer and Jerry White. | Elimination of similar species: Herring Gull - wing tips not black on this bird, + its eye was dark. Iceland (Humelius) - wing tips not as pale grey, legs not pale pink. | The original documentation form event lasted from 10:10:00/10:15:00 on December 24, 1986 and 14:40:00/14:42:00 on December 25, 1986.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 13, 1991
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1991-12-28
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review for two Thayer's Gulls at Lock and Dam 13 in Clinton County, IA on December 28, 1991. Includes a record review document with votes and a documentation form submitted to the committee.
|
Blevins, Brian L.
|
Thayer's Gull
|
Lock and Dam 13
|
Lock + Dam 13 on Mississippi River
|
Mississippi River Flyway just Below the Dam
|
The documentation form by Brian Blevins is the only one submitted and forms the basis of this record. Other observers include Corey Blevins, Lewis Blevins, and Jennifer Anderson. | Elimination of similar species: Herring Gull -> eliminated by the light brown color continuous all the way throughout the wingtips, thus there was not a darkening towards the wing tips. The mantle was also lighter than those of the nearby Herring Gulls. | The original documentation form event lasted from 14:30:00/14:50:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 15 in Davenport, 1988
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-01-01
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Lock and Dam 15 in Davenport in Scott County, IA on January 1, 1988. Includes a record review document with votes and a documentation form submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Thayer's Gull
|
Lock and Dam 15
|
Lock + Dam 15, Davenport, Scott Co, IA
|
Mississippi R.
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Francis Moore and Dick Kraemer. | Elimination of similar species: [...] There were many first year Herrings that were darker with dark wingtips. We also saw, but not at same time, a larger, slightly lighter gull without tail band that we identified as a first year Glaucous Gull. It was consistently larger than Herring and heavier bodied. Uniform color, white flight feathers from below separate bird from Herring. Size and tail band separate from Glaucous. | The original documentation form event lasted from 10:15:00/10:45:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 15 in Davenport, 1989
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-12-17
|
1993-08-06
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Lock and Dam 15 in Davenport in Scott County, IA on December 17, 1989. Includes a record review document with votes and a documentation form submitted to the committee.
|
Blevins, Brian L.
|
Thayer's Gull
|
Lock and Dam 15
|
Just above the Lock + Dam 15 (Davenport, Ia)
|
Frozen ice above the dam in the Mississippi River
|
The documentation form by Brian Blevins is the only one submitted and forms the basis of this record. Other observers include Corey Blevins and Lewis Blevins. | Elimination of similar species: Herring Gull - eliminated by the dark eye and by the lack of black on the primary tips. | The original documentation form event lasted from 15:30:00/15:42:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 15 near Davenport, 1991
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1991-12-15
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review for two Thayer's Gull at Lock and Dam 15 near Davenport in Scott County, IA on December 15, 1991. Includes a record review document with votes and a documentation form submitted to the committee.
|
Blevins, Brian L.
|
Thayer's Gull
|
Lock and Dam 15
|
Lock + Dam 15 on Mississippi River
|
Mississippi River Flyway just below the Dam
|
The documentation form by Brian Blevins is the only one submitted and forms the basis of this record. Other observers include Corey Blevins, Lewis Blevins, and Peter C. Petersen. | Elimination of similar species: Herring Gull -> Immature - eliminated by the light brown color continuous all the way throughout the wingtips, thus there was not a darkening towards the wing tips. Adult - eliminated by the light mantle getting lighter towards the wingtips, with just a few grey spots on the primaries. | The original documentation form event lasted from 15:15:00/15:45:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 15 near Davenport, 1991
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1991-12-31
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Lock and Dam 15 near Davenport in Scott County, IA on December 31, 1991. Includes a record review document with votes and a documentation form submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Thayer's Gull
|
Lock and Dam 15
|
Lock + Dam 15, Davenport, Scott Co., IA
|
Mississippi River
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. | Elimination of similar species: Translucent flight feathers and upper wing pattern and lighter tail band separate from Herring Gull | The original documentation form event lasted from 14:30:00/14:35:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 19 at Keokuk, 1989
|
Administrative records Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-11-24
|
1993-08-06
|
Rare birds documentation form
|
Records Committee review for two Thayer's Gulls at Lock and Dam 19 at Keokuk in Lee County, IA on November 24, 1989. Includes a record review document with votes, four photographs, and a documentation form submitted to the committee.
|
Cecil, Robert I.
|
Thayer's Gull
|
Lock Number 19
|
Behind Lock and Dam 19 at Keokuk in Lee County, Iowa (Iowa side)
|
River (Mississippi)
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The documentation form by Robert Cecil is the only one submitted and forms the basis of this record. Other observers include John Cecil, Tom Kent, and Francis Moore. | Elimination of similar species: Only probable similar species is Herring, which has contrasty wings - dark trailing edge and darker wingtips. The Thayer's were obviously a lighter shade of brown than any Herrings present. I judged these birds to be somewhat smaller than any Herring. I could not totally rule out first year Glaucous-winged. According to NGS, Glaucous-wing has less mottling or scalloping. The Keokuk birds were obviously mottled. | The original documentation form event lasted from 11:05:00/11:30:00.
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Iowa Ornithologists' Union | MS 166
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11
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3
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Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 19 at Keokuk, 1991
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1991-02-16
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1993-07-17
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Rare birds documentation form
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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.
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Allen, Reid I.
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Thayer's Gull
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Lock Number 19
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Lock & Dam #19 - Keokuk, Iowa
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River channel with open water below dam extending 3/4 mile from dam
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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.
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Iowa Ornithologists' Union | MS 166
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11
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3
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Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 19 in Keokuk, 1987
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1987-01-03
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1993-09-07
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Rare birds documentation form
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Records Committee review for a Thayer's Gull at Lock and Dam 19 in Keokuk in Lee County, IA on January 3, 1987. Includes a record review document with votes and two documentation forms submitted to the committee.
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Moore, Francis L.
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Thayer's Gull
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Lock Number 19
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Below lock and dam 19, Keokuk, Lee Co., Iowa
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Open water below lock and dam 19
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The documentation form by Francis L. Moore forms the basis of this record. Another documentation form by Steve Dinsmore was submitted. Another observer includes Robert Cecil. | Elimination of similar species: Herring Gull has more black in the primaries with a grayer mantle, a larger bill and heavier and bigger head. The under surface of the primaries of a Herring is also darker and has the darkness well into the primaries from the tips. | The original documentation form event lasted from 10:30:00/10:40:00.
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Iowa Ornithologists' Union | MS 166
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11
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3
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Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 19, 1986
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1986-12-21
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1993-09-07
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Rare birds documentation form
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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.
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Cecil, Robert I.
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Thayer's Gull
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Lock Number 19
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Lock and Dam 19, Miss. River, Keokuk, Lee Co, Iowa
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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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Records Committee review for rare bird sighting of Thayer's Gull at Lock and Dam 19, 1986
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1986-12-17
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1994-11-04
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Rare birds documentation form
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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.
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Cecil, Robert I.
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Thayer's Gull
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Lock Number 19
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Lock and Dam 19, Keokuk, Lee Co., Iowa
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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 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.
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Iowa Ornithologists' Union | MS 166
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11
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3
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