|
Records Committee review for rare bird sighting of Tundra Swan at Red Rock Reservoir, 1988
|
Administrative records Field notes Forms (documents)
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-12-18
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review of a Tundra Swan at Red Rock Reservoir in Marion County, IA on December 18, 1988. Includes a record review document with votes and two documentation forms submitted to the committee.
|
Johnson, Ann
|
Tundra Swan
|
Red Rock Dam
|
Des Moines River below Red Rock Dam - Marion Co., Iowa
|
river with sandbars
|
The documentation form by Ann Johnson is the earliest and the one that forms the basis of this record. Another documentation form by Steve Dinsmore was submitted later on Jan 6, 1989. Other observers include Erik Munson, Wyman Borts, and Jim Sinclair. | Elimination of similar species: Mute swan immature eliminated by bill color. Trumpeter swan eliminated by the presence of many white feathers at this date and concave bill shape. Unable to determine size difference. | The original documentation form event lasted from 14:00:00/14:15:00.
|
Iowa Ornithologists' Union | MS 166
|
8
|
13
|
|
Records Committee review for rare bird sighting of Tufted Duck at Sweet Marsh, 1980
|
Administrative records Correspondence Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1980-06-30
|
1994-01-28
|
Rare birds documentation form
|
Records Committee review of a Tufted Duck at Sweet Marsh in Bremer County, IA on June 30, 1980. Includes a record review document with votes, two photos, correspondence about the sighting, and two documentation forms submitted to the committee.
|
Myers, Robert K.
|
Tufted Duck
|
Sweet Marsh
|
Sweet Marsh (Tom Stone, Jr. & I first found bird)
|
marshy area near cattails
|
The documentation form by Robert K. Myers is the earliest and the one that forms the basis of this record. Other documentation forms by Francis L. Moore were submitted . Other observers include Russell Hays, Tom Stone, and Tom Stone, Jr. | Elimination of similar species: May be a ring-neck female or scaup but doesn't look right- probably a hybrid. | The original documentation form event lasted from 19:45:00/20:00:00.
|
Iowa Ornithologists' Union | MS 166
|
8
|
16
|
|
Records Committee review for rare bird sighting of Tufted Duck at Lake Manawa, 1980
|
Administrative records Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1980-03-15
|
1993-08-16
|
Rare birds documentation form
|
Records Committee review of a Tufted Duck at Lake Manawa in Pottawattamie County, IA on March 15, 1980. Includes a record review document with votes, internal correspondence about the sighting, and a documentation forms submitted to the committee.
|
Joranson, Eric G.
|
Tufted Duck
|
Lake Manawa
|
Lake Manawa, Council Bluffs, Iowa 150-200 yds from S. Shore
|
|
The documentation form by Eric G. Joranson is the earliest and the one that forms the basis of this record. Other observers include Robert Caughey. | Elimination of similar species: Shot R-n Ducks before. Never seen a Tufted before. R-n duck head "lobey" in contrast with Tufted's crest.
|
Iowa Ornithologists' Union | MS 166
|
8
|
16
|
|
Records Committee review for rare bird sighting of Trumpeter Swan at Otter Creek Marsh, 1984
|
Administrative records Clippings (information artifacts) Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1984-12-23
|
1993-09-01
|
Rare birds documentation form
|
Records Committee review of three Trumpeter Swans at Otter Creek Marsh in Tama County on December 23, 1984. Includes a record review document with votes, correspondence over the sighting, photos from Iowa Bird Life, and a documentation form submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Trumpeter Swan
|
Otter Creek Marsh State Wildlife Refuge
|
Otter Creek M., Tama Co., IA
|
large riverbottom marsh, central drainage open, ponds partly free of ice. Birds were in pond near east end of south dike.
|
The documentation form by Thomas H. Kent is the earliest and the one that forms the basis of this record. Another observer was Gladys Black. | Elimination of similar species: Bill shape and voice exclude Tundra Swan. | The original documentation form event lasted from 14:40:00/16:05:00.
|
Iowa Ornithologists' Union | MS 166
|
8
|
12
|
|
Records Committee review for rare bird sighting of Trumpeter Swan at Lake Manawa, 1993
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-12-13
|
1995-07-08
|
Rare birds documentation form
|
Records Committee review for a Trumpeter Swan at Lake Manawa in Pottawattamie County, IA on December 13, 1993. Includes a record review document with votes and a documentation form submitted to the committee.
|
Bray, Tanya
|
Trumpeter Swan
|
Lake Manawa
|
Lake Manawa, Pottawattamie County
|
|
The documentation form by Tanya Bray is the earliest and the one that forms the basis of this record. Other observers include Babs Padelford and Loren Padelford. | Elimination of similar species: Black bill without knob and neck posture eliminates Mute Swan. Tundra Swan eliminated by neck posture and lack of yellow on bill: darker plumage of juvenile. | The original documentation form event lasted from 09:30:00/09:40:00.
|
Iowa Ornithologists' Union | MS 166
|
8
|
12
|
|
Records Committee review for rare bird sighting of Trumpeter Swan at Ingham Lake, 1988
|
Administrative records Field notes Forms (documents)
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-11-21
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review of a Trumpeter Swan at Ingham Lake in Emmet County, IA on November 21, 1988. Includes a record review document with votes and a documentation form submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Trumpeter Swan
|
Ingham Lake
|
Ingham L., Emmet Co., IA
|
Frozen glacial lake
|
The documentation form by Thomas H. Kent is the earliest and the one that forms the basis of this record. Another observer was Francis Moore. | Elimination of similar species: About two hours later we found a Tundra Swan at Union Slough at closer range. The neck was straight at the base and the black did not come as sharply to the edge. It was seen head on and the black came across the forehead without a pronounced V and the upper mandible was not straight. | The original documentation form event lasted from 14:30:00/15:00:00.
|
Iowa Ornithologists' Union | MS 166
|
8
|
12
|
|
Records Committee review for rare bird sighting of Trumpeter Swan at Charles City, 1989
|
Administrative records Clippings (information artifacts) Field notes Forms (documents) Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-02-26
|
1993-08-05
|
Rare birds documentation form
|
Records Committee review of a Trumpeter Swan at Charles City in Floyd County, IA on February 26, 1989. Includes a record review document with votes, three photocopied photos, an article in Iowa Bird Life, and a documentation form submitted to the committee.
|
Walter, Janice L.
|
Trumpeter Swan
|
Charles City
|
Cedar River at end of Maple St., Charles City, IA
|
Narrow stretch of open water along bank of frozen river
|
The documentation form by Jan L. Walter is the earliest and the one that forms the basis of this record. Other observers include Jim B. Walter and James L. Hansen. | Elimination of similar species: Mute Swan by all black bill without knob at base; neck held straight not in S curve Tundra Swan by forehead slanting down to straight bill, black facial skin ending in broad point at eye, not sharp point in front of eye, and dipping down into a V on forehead, not extending straight across | The original documentation form event lasted from 17:10:00/17:40:00.
|
Iowa Ornithologists' Union | MS 166
|
8
|
12
|
|
Records Committee review for rare bird sighting of Trumpeter Swan at Blue Lake, 1994
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1994-04-10
|
1996-04-25
|
Rare birds documentation form
|
Records Committee review of a Trumpeter Swan at Blue Lake in Monona County, Iowa on April 10, 1994. Includes a record review document with votes and two documentation forms submitted to the committee.
|
Huser, Bill F.
|
Trumpeter Swan
|
Blue Lake
|
Blue Lake, Monona County, Iowa
|
marshy oxbow with open, but shallow, water
|
The documentation form by Bill Huser is the earliest and the one that forms the basis of this record. Another documentation form by Peter Ernzen was submitted later. | Elimination of similar species: Mute swans usually have a curved neck posture with the bill held below horizontal. Their springtime bill color is expected to be pink. Tundra Swans are expected to have a concave bill, a slight forehead and a smaller proportioned bill. The facial skin extending to the eye is less substantial. The neck posture is usually vertical without the 'kink' at the base. The feathered edge between the eyes forms a straight line. | The original documentation form event lasted from 07:30:00/10:30:00.
|
Iowa Ornithologists' Union | MS 166
|
8
|
12
|
|
Records Committee review for rare bird sighting of Tricolored Heron at IPL Ponds, 1991
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1991-05-04
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review of a Tricolored Heron at the Iowa Power and Light settling ponds, in Council Bluffs, IA on May 4, 1991. Includes a record review document with votes, an Iowa Bird Life article, and a documentation form submitted to the committee.
|
Greer, Janet
|
Tricolored Heron
|
MidAmerican Energy Ponds
|
Iowa Power and Light settling ponds, Council Bluffs, IA
|
lakeshore
|
The documentation form by Janet Greer is the earliest and the one that forms the basis of this record. Other observers include Marge Graf, Dutch Graf, and Mary Jo Harlow. | Elimination of similar species: Great Blue Heron: Eliminated by bill color, rusty feathers on the breast, white belly and leg color, and dark face and crown. Little Blue Heron: Eliminated by size, rusty wing coverts, and white chin. | The original documentation form event lasted from 11:30:00/12:40:00.
|
Iowa Ornithologists' Union | MS 166
|
7
|
18
|
|
Records Committee review for rare bird sighting of Tricolored Heron at Cone Marsh, 1989
|
Administrative records Clippings (information artifacts) Correspondence Field notes Maps (documents)
|
Bird watching Ornithology Ornithology--Societies, etc Wildlife conservation
|
1989-04-29
|
1993-08-05
|
Rare birds documentation form
|
Records Committee review of a Tricolored Heron at Cone Marsh, Louisa County, IA on April 29, 1989. Includes record review documents with votes, articles in Iowa Bird Life and the Loon, maps of Tri-Colored Heron sightings and breeding areas, correspondence about the sighting from Ross Silcock to Carl Bendorf, from to Dick Shaffer to Thomas H. Kent, from Bruce Peterjohn to Thomas H. Kent and committee votes, and a documentation form submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Tricolored Heron
|
Cone Marsh Wildlife Management Area
|
Cone M., Louise Co., IA
|
marsh
|
The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Dick Shaffer. | Elimination of similar species: Size and white belly eliminate other herons. Apparently an immature or non-breeding plumaged adult. | The original documentation form event lasted from 10:50:00/10:59:00.
|
Iowa Ornithologists' Union | MS 166
|
7
|
18
|
|
Records Committee review for rare bird sighting of three Red-throated Loons at Little Wall Lake, 1995.
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1995-04-22
|
2000-11-19
|
Rare birds documentation form
|
Records Committee review for a Red-throated Loon at Little Wall Lake in Hamilton County, IA on April 22, 1995. Includes a record review document with votes, an Iowa Bird Life article, and four documentation forms submitted to the committee.
|
Proescholdt, Mark
|
Red-throated Loon
|
Little Wall Lake
|
Little Wall Lake - (Hamilton County)
|
small lake with trees along edges
|
The documentation form by Mark Proescholdt is the earliest and the one that forms the basis of this record. Other documentation forms by Beth Proescholdt, John Paulin, and Thomas Kent were submitted later. Other observers include Russ Widner, Caryn Hurd, Chris Paulin, Andy Hurd, Stacy Smithson, and Dawn Schwebach. | Elimination of similar species: A Basic-Plumaged Pacific Loon has no white or pale area above or in front of the eye. It also has a sharp vertical division between dark and light on its neck. A Common Loon is bulkier and bigger and has a large thick bill whose mandibles are straight. | The original documentation form event lasted from 14:00:00/16:00:00.
|
Iowa Ornithologists' Union | MS 166
|
7
|
5
|
|
Records Committee review for rare bird sighting of Thayer's Gull north of Jester Park at Saylorville Reservoir, 1988
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-11-30
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review for one to three Thayer's Gulls north of Jester Park at Saylorville Reservoir in Polk County, IA on November 30, 1988. Includes a record review document with votes and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Thayer's Gull
|
Jester Park
|
Saylorville Reservoir, Polk Co.-north of Jester Park
|
feeding in river channel with thousands of other gulls
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include many unidentified other observers. | Elimination of similar species: The bill and leg color and size eliminates all gulls except Herring, Thayer's, and Iceland gulls. The uniform dark color of the wings, lack of a lighter "window" on the inner primaries, and the silvery color of the underside of the flight feathers eliminates 1st-winter Herring and Iceland gulls. | The original documentation form event lasted from 13:38:00/14:55:00 on November 30, 1988.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull north of Jester Park at Saylorville Reservoir, 1988
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-11-30
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull north of Jester Park at Saylorville Reservoir in Polk County, IA on November 30, 1988. Includes a record review document with votes and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Thayer's Gull
|
Jester Park
|
Saylorville Reservoir, Polk Co.-north of Jester Park
|
feeding in river channel with thousands of other gulls
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: The bill and leg color and size eliminates all gulls except Herring, Thayer's, and Iceland gulls. The uniform dark color of the wings, lack of a lighter "window" on the inner primaries, and the silvery color of the underside of the flight feathers eliminates 1st-winter Herring and Iceland gulls. | The original documentation form event lasted from 13:38:00/14:55:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull near Saylorville Reservoir Dam and Oak Grove Beach, 1986
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-11-23
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for seven or more Thayer's Gulls near Saylorville Reservoir Dam and Oak Grove Beach in Polk County, IA on November 23, 1986. Includes a record review document with votes, a summary of the review, and seven documentation forms submitted to the committee.
|
Dinsmore, Stephen J.
|
Thayer's Gull
|
Saylorville Dam Oak Grove Recreation Area
|
Saylorville Reservoir, Polk Co.(Oak Grove Beach and near dam)
|
seen resting on beach and flying over water near dam
|
The documentation form by Steve Dinsmore forms the basis of this record. Other documentation forms by Steve Dinsmore were submitted. Other observers include Paul Martsching, Bob Myers, Beth Proescholdt, Mark Proescholdt, and many unidentified other observers. | Elimination of similar species: The darker body plumage and dark tail band eliminate Iceland Gull (Kumlien's form). The smaller size, smaller, more delicate bill, more rounded head, silvery white underwing pattern, more uniform body color, and more uniform upperwing pattern eliminate first winter Herring Gull. | The original documentation form event occurred at various times.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull near Oak Grove Beach and Saylorville Reservoir Dam, 1986
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1986-11-23
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull near Oak Grove Beach and Saylorville Reservoir Dam in Polk County, IA on November 23, 1986. Includes a record review document with votes, a summary of the review, and ten documentation forms submitted to the committee.
|
Dinsmore, Stephen J.
|
Thayer's Gull
|
Saylorville Dam Oak Grove Recreation Area
|
Saylorville Reservoir, Polk Co. (Oak Grove Beach and near dam)
|
seen resting on beach and flying over water near dam
|
The documentation form by Steve Dinsmore forms the basis of this record. Other documentation forms by Bob Myers, Mark Proescholdt, Beth Proescholdt, Thomas H. Kent, Jim Fuller, Francis L. Moore, Robert Cecil, and Paul Martsching were submitted. | Elimination of similar species: The darker body plumage and dark tail band eliminate Iceland Gull (Kumlien's form). The smaller size, smaller, more delicate bill, more rounded head, silvery white underwing pattern, more uniform body color, and more uniform upperwing pattern eliminate first winter Herring Gull. | The original documentation form event lasted from 10:50:00/11:55:00 and 15:50:00/16:05:00 on November 23, 1986 and 14:50:00/15:35:00 on November 24, 1986.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull near Lindsay Park in Davenport, 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 near Lindsay Park in Davenport in Scott County, IA on February 18, 1989. Includes a record review document with votes and a documentation form submitted to the committee for this sighting.
|
Petersen, Peter C.
|
Thayer's Gull
|
Lindsay Park
|
Lindsay Park Boat Club harbor, east edge of Davenport Scott Co.
|
On ice shelf along Mississippi River, 40 yards from sea wa[...]
|
The documentation form by Peter C. Petersen is the only one submitted and forms the basis of this record.Other observers include Walter Zuurdeeg and many unidentified observers. | Elimination of similar species: [...] Immature gull same size as nearby Herring Gulls. [...] Head smaller than Herrings, bill more slight, black, + not thickened at the tip, compared to Herrings. When wings spread - this was seen twice, the upper surface seemed fairly uniform with no dark tip pattern as in the Herrings. | The original documentation form event lasted from 09:50:00/09:55:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull near Horse Island near Davenport, 1989
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-01-02
|
1993-08-05
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull near Horse Island near Davenport in Scott County, IA on January 2, 1989. Includes a record review document with votes and a documentation form submitted to the committee.
|
Petersen, Peter C.
|
Thayer's Gull
|
Horse Island
|
downstream tip of Enchanted Island. Davenport, Scott Co. IA
|
Mississippi River - edge of open water, Iowa side
|
The documentation form by Peter C. Petersen is the only one submitted and forms the basis of this record. Other observers include Brian Blevins and Corey Blevins. | Elimination of similar species: Herring Gull - eye light, wing tips black with white windows, bill larger than Thayers. California Gull - eye light, wing tips black with white windows, yellow legs. | The original documentation form event lasted from 13:35:00/13:50:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Saylorville Reservoir Dam, 1987
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1987-12-02
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for two or more Thayer's Gulls at Saylorville Reservoir Dam in Polk County, IA on December 2, 1987. Includes a record review document with votes and five documentation forms submitted to the committee.
|
Dinsmore, Stephen J.
|
Thayer's Gull
|
Saylorville Dam
|
Saylorville Reservoir, Polk Co.
|
sitting on ice with other gulls
|
The documentation form by Steve Dinsmore forms the basis of this record. Other documentation forms by Francis L. Moore, Steve Dinsmore, and Mark Proescholdt were submitted. Other observers include Andy Fix, Beth Proescholdt, Eugene Armstrong, Eloise Armstrong, Bob Cecil, Bery Engebretsen, Jim Sinclair, and many unidentified observers. | Elimination of similar species: The overall dark color of the bird and the lack of paler wingtips eliminates first-winter Iceland Gull. The translucent flight feathers, uniform body color, lack of a "window" on the upperwing, smaller, thinner bill, rounder head, dark smudge around the eye, and smaller size eliminates first-winter Herring Gull. The uniform body color, lack of a dark tail band, and translucent flight feathers eliminates first-winter Lesser Black-backed Gull. | The original documentation form event lasted from 08:00:00/08:05:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Saylorville Dam, 1989
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-01-28
|
1993-08-05
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Saylorville Dam in Polk County, IA on January 28, 1989. Includes a record review document with votes and a documentation form submitted to the committee.
|
Johnson, Ann
|
Thayer's Gull
|
Saylorville Dam
|
Saylorville Lake, Polk Co., IA
|
dam on Des Moines River forming reservoir
|
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. Other similar gulls do not share this "dove head." The bird was confirmed by the silvery underwings and very little dark coloring on the upper side of the primaries, characteristics not shared by similarly gray-mantled gulls. | The original documentation form event lasted from 08:40:00/08:40:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Saylorville Dam, 1989
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-11-28
|
1993-08-06
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Saylorville Dam in Polk County, IA on November 28, 1989. Includes a record review document with votes and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Thayer's Gull
|
Saylorville Dam
|
Saylorville Reservoir, Polk Co.-above dam
|
feeding with other gulls on large reservoir
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Bob Myers. | Elimination of similar species: The size, uniform body color, pale underside of the flight feathers, and dark bill eliminates othr [sic] gulls. Iceland Gull eliminated by uniform wing color without noticeably lighter wingtips. | The original documentation form event lasted from 16:15:00/16:20:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Saylorville Dam, 1989
|
Administrative records Clippings (information artifacts) Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-12-07
|
1993-08-06
|
Rare birds documentation form
|
Records Committee review for two Thayer's Gulls at Saylorville Dam in Polk County, IA on December 7, 1989. Includes a record review document with votes, a photocopy of a photograph on the cover page of Iowa Bird Life, and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Thayer's Gull
|
Saylorville Dam
|
Saylorville Reservoir, Polk Co.
|
large reservoir
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: The size, uniform body and wing color, pale underside of the flight feathers, and tail band eliminates Herring and Glaucous/Iceland gulls, the most likely candidates for confusion. | The original documentation form event lasted from 14:04:00/16:42:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Saylorville Dam, 1988
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-12-30
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review for two Thayer's Gulls at Saylorville Dam in Polk County, IA on December 30, 1988. Includes a record review document with votes and a documentation form submitted to the committee.
|
Johnson, Ann
|
Thayer's Gull
|
Saylorville Dam
|
Saylorville Lake, Polk Co., IA
|
dam on Des Moines River forming reservoir
|
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. Other similar gulls do not share this "dove head." The adult was confirmed by the silvery underwings, not shared by similarly gray-mantled gulls, and the first year bird was confirmed by the uniformity of its body color. | The original documentation form event lasted from 15:40:00/15:55:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting of Thayer's Gull at Saylorville Dam, 1981
|
Administrative records Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1981-12-10
|
1993-08-26
|
Rare birds documentation form
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Records Committee review for a Thayer's Gull at Saylorville Dam in Polk County, IA on December 10, 1981 recorded incorrectly as 1982 on the documentation form. Includes a record review document with votes, correspondence and commentary about the sighting, and a documentation form submitted to the committee.
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Schaufenbuel, Joseph P.
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Thayer's Gull
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Saylorville Dam
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Above and below Saylorville Dam
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Open water, rocky shore and ice covered pond.
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The documentation form by Joe Schaufenbuel is the only one submitted and forms the basis of this record. | Elimination of similar species: [...] Nearly the same size as an immature Herring Gull, but neck seemed thinner, head smaller. Bill was same length as a Herring Gull's but was blunter, not as strongly hooked. [...] The primaries were not nearly as dark as immature (1st year) or 2nd year Herring Gulls and was of a much different color than the black color of that species. Primaries and tail were nearly the same color. [...] In flight this bird could be easily picked out from the immature Herring Gulls at considerable distances. Using 7x35 binoculars the beige color of the upper surface of wings and translucent underwing could be detected as far as three-quarters of a mile. There were also three other birds that resembled this particular bird though they appeared darker on the upperparts. However I was unable to get close observations of these birds. The bird I observed closely and documented had one primary feather missing and aided in tracking the bird from day to day.
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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 Red Rock Reservoir, 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 Red Rock Reservoir in Marion County, IA on January 3, 1987. Includes a record review document with votes and a documentation form submitted to the committee.
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Kent, Thomas H. (Thomas Hugh), 1934-
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Thayer's Gull
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Lake Red Rock
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Red Rock Res., Marion Co., Iowa
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reservoir, partly frozen
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The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Tom Staudt, Steve Dinsmore, and unidentified other observers. | Elimination of similar species: The uniform coloration and lack of dark wing tips were the main marks used to separate it from Herring Gull. | The original documentation form event lasted from approximately 13:30:00/13:45:00.
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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 Red Rock Reservoir, 1986
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1986-12-03
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1993-09-07
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Rare birds documentation form
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Records Committee review of two Thayer's Gulls at Red Rock Reservoir in Marion County, IA on December 3, 1986. Includes a record review document with votes and a documentation form submitted to the committee.
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Kent, Thomas H. (Thomas Hugh), 1934-
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Thayer's Gull
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Lake Red Rock
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Red Rock Reservoir
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reservoir with ice and open water.
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The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Cal Knight, Bernie Knight, and Jim Fuller. | Elimination of similar species: Herring Gull --see above. [...] The bird is not any larger than some of the ring-bills--some of the ring-bills are smaller. The larger ring-bills are almost as big as this bird, and it is distinctly smaller than a number of Herring Gulls in the same field. The bill is much smaller and thinner; the head is small. [...] The striking thing about this bird is the size, bill shape and head shape compared to the nearby herrings and very distinct smudge through the eye." | The original documentation form event lasted from around 09:10:00 for several minutes and 15:55:00 for many minutes.
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Iowa Ornithologists' Union | MS 166
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11
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3
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