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Records Committee review for rare bird sighting of Western Sandpiper at Saylorville Reservoir, 1988
|
Administrative records Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-10-08
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review of a Western Sandpiper at Saylorville Reservoir in Polk County, IA on October 8, 1988. Includes a record review document with votes, correspondence about the bird sighting, and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Western Sandpiper
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co.-north end of reservoir
|
feeding in shallow water adjacent to mudflat with other shorebirds
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Andy Fix. | Elimination of similar species: see above [...] The bird was roughly 25% smaller than a Pectoral Sandpiper. [...] Note that we saw a single Semipalmated Sandpiper in the same flock of shorebirds. The Semipalmated Sandpiper had a shorter, thicker bill, more of a brown wash on the breast, and frequented the edge of the mudflat rather than wading in the water. | The original documentation form event lasted from 15:30:00/16:45:00.
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Iowa Ornithologists' Union | MS 166
|
10
|
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 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 Red-throated Loon at Saylorville Reservoir, 1989
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-11-08
|
1993-08-05
|
Rare birds documentation form
|
Records Committee review for a Red-throated Loon at Saylorville Reservoir in Polk County, IA on November 8, 1989. Includes a record review document and a documentation form submitted to the committee. IOU record review document has incorrect date of November 8, 1990 instead of correct date of November 8, 1989.
|
Dinsmore, Stephen J.
|
Red-throated Loon
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co.-off Cherry Glen Rec. Area
|
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 small size, head posture, small head, and short, thin, upturned bill eliminates other loons. | The original documentation form event lasted from 16:02:00/16:40:00.
|
Iowa Ornithologists' Union | MS 166
|
7
|
5
|
|
Records Committee review for rare bird sighting of Common Black-headed Gull at Cherry Glen Recreation Area at Saylorville Reservoir, 1989
|
Administrative records Clippings (information artifacts) Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-11-02
|
1993-08-05
|
Rare birds documentation form
|
Records Committee review for a Common Black-headed Gull at Cherry Glen Recreation Area at Saylorville Reservoir in Polk County, IA on November 2, 1989. Includes a record review document with votes, an article in Iowa Bird Life, photocopies of four photographs, and two documentation forms submitted to the committee.
|
Dinsmore, Stephen J.
|
Black-headed Gull
|
Cherry Glen Recreation Area
|
Saylorville Reservoir, Polk Co.-off Cherry Glen Rec. Area
|
large reservoir
|
The documentation form by Steve Dinsmore is the earliest and the one that forms the basis of this record. Another documentation form by B.J. Rose was submitted later. Other observers include Doug Rose, Roger Rose, and Ken Lowder. | Elimination of similar species: Because of the fairly small size and conspicuous dark spot behind each eye, the bird must have been a Bonaparte's, Little, Common Black-headed, or Ross' gull, or a kittiwake. Separation from Bonaparte's Gull is discussed above. Little Gull eliminated by its smaller size, dark bill, lack of any black color on the upperwing, and uniformly dark underside to the flight feathers. Ross' Gull eliminated by tail shape, bill size and color, and darker underwing. Both kittiwakes eliminated by bill color, lighter mantle color, and differences in wing pattern. | The original documentation form event lasted from 16:17:00/16:42:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
21
|
|
Records Committee review for rare bird sighting of Parasitic Jaeger at the Cherry Glen Recreation Area at Saylorville Reservoir, 1990
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1990-09-03
|
1993-07-17
|
Rare birds documentation form
|
Records Committee review of a Parasitic Jaeger at Cherry Glen Recreation Area at Saylorville Reservoir in Polk County, IA on September 3, 1990. Includes a record review document with votes and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Parasitic Jaeger
|
Cherry Glen Recreation Area
|
Saylorville Reservoir, Polk Co.-off Cherry Glen Recreation Area
|
|
The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. Other observers include Scott Rolfes. | Elimination of similar species: The color and wing crescent eliminates all larids except skuas and Pomarine and Long-tailed jaegers. Skuas are easily eliminated by their larger size, heavier bill, and more prominent white patches on the wings. Long-tailed Jaeger is eliminated by the presence of a white crescent on the upper surface of the wing. Pomarine Jaeger can be eliminated by its larger, heavier body size, more prominent white crescent on the wing, presence of white greater underprimary coverts, larger-headed appearance, heavier bill, and general lack of rufous color on the body. | The original documentation form event lasted from 16:22:00/16:51:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
16
|
|
Records Committee review for rare bird sighting of Pacific Loon at Saylorville Reservoir, 1989
|
Administrative records Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-10-22
|
1993-08-05
|
Rare birds documentation form
|
Records Committee review for a Pacific Loon at Saylorville Reservoir in Polk County, IA on October 22, 1989. Includes a record review document with votes, a print with three photos and four documentation forms submitted to the committee.
|
Dinsmore, Stephen J.
|
Pacific Loon
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co.-off dam and Cherry Glen Rec. Area
|
large reservoir
|
The documentation form by Steve Dinsmore is the earliest and the one that forms the basis of this record. Other documentation forms by Bob Myers, Ann Johnson, and Ray Cummins were submitted later. Other observers include Becky Myers, Pam Allen, Reed Allen, Eugene Armstrong, and Eloise Armstrong. | Elimination of similar species: The combination of smaller size, short, straight bill, neck pattern, and contrast between the head and rest of the upperparts eliminates other loons. | The original documentation form event lasted from 07:46:00/11:56:00.
|
Iowa Ornithologists' Union | MS 166
|
7
|
7
|
|
Records Committee review for rare bird sighting of a Pacific Loon at Saylorville Resevoir, 1987
|
Administrative records Correspondence Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1987-11-05
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for a Pacific Loon at Saylorville Reservoir in Polk County, IA on November 5, 1987. Includes a record review document with votes, correspondence with the California Bird Records Committee between from Don Roberson and Ronald E. Goetz to Thomas H. Kent, and two documentation forms.
|
Dinsmore, Stephen J.
|
Pacific Loon
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co.-off Jester Park
|
swimming on large reservoir
|
The documentation form by Steve Dinsmore is the earliest and the one that forms the basis of this record. Another documentation forms by Mark Proescholdt was submitted later. Other observers were Beth Proescholdt, Dennis Thompson, and Berry Engebretson. | Elimination of similar species: The slimmer, shorter bill, rounded head, and sharp contrast between the neck and the back eliminates Common and Yellow-billed loons. The shorter, straight bill and unmarked back eliminates Red-throated Loon. | The original documentation event lasted from 11:45:00/12:30:00.
|
Iowa Ornithologists' Union | MS 166
|
7
|
7
|
|
Records Committee review for rare bird sighting of Great Black-backed Gull at Jester Park at Saylorville Reservoir, 1987
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1987-11-07
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for a Great Black-backed Gull at Jester Park at Saylorville Reservoir in Polk County, IA on November 7, 1987. Includes a record review document with votes and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Great Black-backed Gull
|
Jester Park
|
Saylorville Reservoir, Polk Co.-off Jester Park
|
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. Another observer includes Andy Fix. | Elimination of similar species: The large size and dark wingtips eliminates all gulls except Western and Yellow-footed. The massive, dark bill, tail pattern, and pale body color eliminates these. | The original documentation form event lasted from approximately 10:15:00/10:20:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
8
|
|
Records Committee review for rare bird sighting of Jaeger species at Jester Park at Saylorville Reservoir, 1987
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1987-10-27
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for a Jaeger species bird at Jester Park at Saylorville Reservoir in Polk County, IA on October 27, 1987. Includes a record review document with votes and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Jaegers
|
Jester Park
|
Saylorville Reservoir, Polk Co.-off Jester Park
|
landed with other gulls roosting on reservoir
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: The body color and wing pattern eliminates all other larids. I was not able to identify the bird to species because of the poor light. | The original documentation form event lasted from 16:56:00/17:21:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
13
|
|
Records Committee review for rare bird sighting of Little Gull at Sandpiper Beach at Saylorville Reservoir, 1989
|
Administrative records Clippings (information artifacts) Correspondence Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1989-10-08
|
1996-01-25
|
Rare birds documentation form
|
Records Committee review for a Little Gull at Sandpiper Beach at Saylorville Reservoir in Polk County, IA on October 8, 1989. Includes a record review document with votes, correspondence about the request for reevaluation of record, a photograph, photocopy of two photographs, an article in Iowa Bird Life, and three documentation forms submitted to the committee.
|
Dinsmore, Stephen J.
|
Little Gull
|
Sandpiper Recreation Area
|
Saylorville Reservoir, Polk Co.-seen off Sandpiper Beach Recreation Area
|
seen flying over large reservoir with several Ring-billed Gulls
|
The documentation form by Steve Dinsmore is the earliest and the one that forms the basis of this record. Other documentation forms by Pam Allen and Reid Allen were submitted later. | Elimination of similar species: The bird was obviously too small to be one of the larger gulls, like a Ring-billed or a Herring gull. The very pale mantle, dark spot behind each eye, and lack of black on the top of the primaries eliminates Franklin's and Laughing gulls. The black underside of the flight feathers, pale gray mantle and wings, white wingtips, and rounded wings eliminates Bonaparte's and Sabine's gulls and kittiwakes. The square tail and wing pattern eliminates Ross' Gull. The smaller size, black underside of the flight feathers, lack of a white "wedge" on the upper surface of the outer primaries, rounder wings, and lack of black on the upper surface of the primaries eliminates Common Black-headed Gull. | The original documentation form event lasted from 09:30:00/09:34:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
20
|
|
Records Committee review for rare bird sighting of Pomarine Jaeger at Saylorville Reservoir, 1988
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-09-28
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review of two Pomarine Jaegers at Saylorville Reservoir in Polk County, IA on September 28, 1988. Includes a record review document with votes, an article in Iowa Bird Life, and six documentation forms submitted to the committee.
|
Dinsmore, Stephen J.
|
Pomarine Jaeger
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co.-south end of lake
|
resting and feeding on large reservoir
|
The documentation form by Steve Dinsmore is the earliest and the one that forms the basis of this record. Other documentation forms by Bob Myers, Thomas H. Kent, Peter C. Petersen, Beth Proescholdt, and Mark Proescholdt were submitted later. Other observers include Babs Padelford, Loren Padelford, Jim Sinclair, Bery Engebretsen, Eugene Armstrong, Eloise Armstrong, Jim Dinsmore, Jim Fuller, Brian Blevins, and many unidentified other observers. | Elimination of similar species: The gull-like shape, dark color, and white wing patches eliminate all birds except Jaegers. The large size compared to Ring-billed Gulls, heavy build, large, thick bill, prominent white patches on the upper and under surface on the wings, and the presence of a second white "crescent" on the underwing at the base of the primary coverts eliminate both Parasitic and Long-tailed Jaegers. | The original documentation form event lasted from 12:24:00/14:46:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
15
|
|
Records Committee review for rare bird sighting of Parasitic Jaeger at Saylorville Reservoir, 1988
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-09-29
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review of a Parasitic Jaeger at Saylorville Reservoir in Polk County, IA on September 29, 1988. Includes a record review document with votes and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Parasitic Jaeger
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co.-south end of lake
|
flying over large reservoir
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Bery Engebretsen and Jim Sinclair. | Elimination of similar species: The dark color and white patches on the wings eliminates all larids except jaegers. The noticeable amount of white on the wing, visible on the underside of the wing, eliminates Long-tailed Jaeger. The small size compared to a Ring-billed Gull, less prominent white on the wing, smaller bill size, and more rapid wing strokes eliminates Pomarine Jaeger. | The original documentation form event lasted from 16:46:00/17:14:00 on September 29, 1988 and 10:15:00/10:35:00 on September 30, 1988.
|
Iowa Ornithologists' Union | MS 166
|
10
|
16
|
|
Records Committee review for rare bird sighting of Laughing Gull at Sandpiper Beach at Saylorville Reservoir, 1996
|
Administrative records Clippings (information artifacts) Correspondence Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1996-05-10
|
2000-11-22
|
Rare birds documentation form
|
Records Committee review for a Laughing Gull at Sandpiper Beach at Saylorville Reservoir in Polk County, IA on May 10, 1996. Includes one record review document with votes, a photograph, correspondence about bird sighting, an Iowa Bird Life Article, and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Laughing Gull
|
Sandpiper Recreation Area
|
Saylorville Reservoir, Polk Co., IA
|
resting on beach with other gulls
|
The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: The bird was clearly one of the "hooded" gulls. The combination of size, mantle color, and upperwing pattern eliminates all of the hooded gulls except for Franklin's Gull. The larger size, less obvious white eye crescents, larger and longer bill, and extensively dark tips to the underwings eliminated Franklin's Gull. | The original documentation form event lasted from 12:45:00/13:10:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
18
|
|
Records Committee review for rare bird sighting of Iceland Gull at Saylorville Reservoir, 1992
|
Administrative records Clippings (information artifacts) Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1992-02-29
|
1994-10-18
|
Rare birds documentation form
|
Records Committee review for an Iceland Gull at Saylorville Reservoir in Polk County, IA on February 29, 1992. Includes a record review document with votes, two photographs, an article in Iowa Bird Life, and two documentation forms submitted to the committee.
|
Kent, Thomas H. (Thomas Hugh), 1934-
|
Iceland Gull
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co., IA
|
Near boat marina on shore and swimming with Ring-billed Gulls at wide part of reservoir.
|
The documentation form by Thomas H. Kent forms the basis of this record. Another documentation form by Bob Cecil was submitted. Other observers include John Cecil, Bob Myers, and Maridel Jackson. | Elimination of similar species: The small size, small head and bill, and all dark bill exclude Glaucous Gull. The lack of any dark in the wing or tail exclude Thayer's Gull. | The original documentation form event lasted from approximately 12:30:00/13:00:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
4
|
|
Records Committee review for rare bird sighting of Mew Gull at Saylorville Reservoir, 1996
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1996-11-29
|
2000-11-22
|
Rare birds documentation form
|
Records Committee review of a Mew Gull at Saylorville Reservoir in Polk County, IA on November 29, 1996. Includes a record review document with votes, an article in Iowa Bird Life, and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Mew Gull
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co., IA
|
large reservoir
|
The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: The wing pattern, size, and lack of black marks on the face eliminated any of the smaller gulls (i.e. Bonaparte's). The small size and smaller bill size eliminated California Gull. Ring-billed Gull was eliminated on the basis of the darker mantle and upperwings, large, dark eye, and bill color and shape. | The original documentation form event lasted from 16:03:00/16:41:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
23
|
|
Records Committee review for rare bird sighting of Red Phalarope at Saylorville Reservoir Dam, 1991
|
Administrative records Clippings (information artifacts) Correspondence Field notes Photographs
|
Bird watching Ornithology Ornithology--Societies, etc
|
1991-08-04
|
1996-01-25
|
Rare birds documentation form
|
Records Committee review for a Red Phalarope at Saylorville Reservoir Dam in Polk County, IA on August 4, 1991. Includes a record review document with votes, an article in Iowa Bird Life, correspondence from Stephen J. Dinsmore to the IOU committee, two photographs with two photocopies of them, and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Red Phalarope
|
Saylorville Dam
|
Saylorville Reservoir, Polk Co., IA-above dam
|
swimming on lake near rocky dam face
|
The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: The general body shape and swimming behavior identified the bird as a phalarope. The unstreaked, gray mantle, thicker, bicolored bill, and buffy wash on the underparts eliminates Red-necked and Wilson's phalaropes. | The original documentation form event lasted from 10:38:00/10:52:00 and 10:59:00/11:14:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
12
|
|
Records Committee review for rare bird sighting of Mew Gull at Lakeview Recreation Area at Saylorville Reservoir, 1993
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1993-12-20
|
1996-01-25
|
Rare birds documentation form
|
Records Committee review of a Mew Gull at Lakeview Recreation Area at Saylorville Reservoir in Polk County, IA on December 20, 1993. Includes a record review document with votes, an article in Iowa Bird Life, and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Mew Gull
|
Lakeview Recreation Area
|
Saylorville Reservoir, Polk Co., IA-on jetty at Lakeview Rec. Area
|
perched on jetty with other gulls
|
The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. Other observers include Susan Grove, Eugene Armstrong, and Eloise Armstrong. | Elimination of similar species: On the basis of size and general plumage characters, this species could only be confused with Ring-billed Gull, hundreds of which were available for direct comparison. The combination of slightly smaller size, distinct head shape, bill color and shape, dark eye, and slightly darker mantle and upperwings are sufficient to eliminate Ring-billed Gull. | The original documentation form event lasted from 15:42:00/16:53:00.
|
Iowa Ornithologists' Union | MS 166
|
10
|
23
|
|
Records Committee review for rare bird sighting of Parasitic Jaeger at Saylorville Reservoir, 1985
|
Administrative records Clippings (information artifacts) Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1985-10-14
|
1993-09-03
|
Rare birds documentation form
|
Records Committee review for a Parasitic Jaeger at Saylorville Reservoir in Polk County, IA on October 14, 1985. Includes a record review document with votes, an article of Iowa Bird Life, and six documentation forms submitted to the committee.
|
Myers, Robert K.
|
Parasitic Jaeger
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co., Iowa
|
General: Saylorville Reservoir- large impoundment on DesMoines [sic] River. Specific: Always out in main deeper part of lake.
|
The documentation form by Robert K. Myers is the one that forms the basis of this record. Other documentation forms by Stephen Dinsmore, Francis L. Moore, Carl J. Bendorf, Thomas H. Kent, and Bery Engebretsen were submitted. Other observers include Dennis Thompson, Eloise Armstrong, Eugene Armstrong, Tom Staudt, and many unidentified observers. | Elimination of similar species: Pomarine Jaeger and Long-tailed Jaeger are possible. See explanation on back as to why I believe this was Parasitic Jaeger. [...] A juvenile dark phase Pomarine would also show much white in the base of primaries (top and bottom) and the tail wouldn't have any long streamers. The Pomarine should however be a larger bird (Herring Gull size). The Pomarine's flight should be slower and more labored than this bird was. A juvenile dark phase Long-tailed Jaeger would not show as much white on dorsal side of primaries as this bird did and the flight pattern should be almost tern-like which it was not. Long-tailed Jaegers should also appear to be more grayish than the bird in question- even in dark phase. Further note on size-- As the jaeger rested on the water, double-crested cormorants would sometimes swim into the field of view and they appeared to be at least one-third larger than the jaeger. A pied-billed grebe also swam near once and the jaeger was probably 1/4 again longer than the grebe. | The original documentation form event lasted from 09:15:00/09:40:00 and seen several times after that for a total of sixty minutes.
|
Iowa Ornithologists' Union | MS 166
|
10
|
16
|
|
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 Mew Gull at Saylorville Reservoir, 1998
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1998-12-20
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2000-11-24
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Rare birds documentation form
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Records Committee review for a Mew Gull at Saylorville Reservoir in Polk County, IA on December 20, 1998. Includes a record review document with votes and a documentation form submitted to the committee.
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Dinsmore, Stephen J.
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Mew Gull
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Saylorville Lake
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Saylorville Reservoir, Polk County, Iowa
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feeding in spillway and resting on large reservoir
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The documentation form by Stephen J. Dinsmore is the only one submitted and forms the basis of this record. Another observer was Kay Niyo. | Elimination of similar species: The only similar species (Ring-billed Gull) was eliminated by the combination of slightly smaller size, smaller bill, more extensive brown color on the underparts, and pattern of the rectrices. | The original documentation form event lasted from 13:46:00/14:08:00.
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Iowa Ornithologists' Union | MS 166
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10
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23
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Records Committee review for rare bird sighting of Arctic Tern at Sandpiper Beach at Saylorville Reservoir, 1999
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Administrative records Field notes Photographs
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Bird watching Ornithology Ornithology--Societies, etc
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1999-08-18
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2000-11-28
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Rare birds documentation form
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Records Committee review for an Arctic Tern at Sandpiper Beach at Saylorville Reservoir in Polk County, IA on August 18, 1999. Includes a record review document with votes, four photographs, and three documentation forms submitted to the committee.
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Dinsmore, Stephen J.
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Arctic Tern
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Sandpiper Recreation Area
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Saylorville Reservoir, Polk County, Iowa
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large reservoir
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The documentation form by Steve Dinsmore forms the basis of this record. Other documentation forms by James J. Dinsmore and Ann Johnson were submitted. | Elimination of similar species: The combination of size, bill shape and color, white cheek, dark gray underparts, leg length, and wing pattern eliminate other species of Sterna. | The original documentation form event lasted from 17:30:00/17:55:00.
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Iowa Ornithologists' Union | MS 166
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12
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2
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Records Committee review for rare bird sighting of Arctic Tern at Sandpiper Beach at Saylorville Reservoir, 1999
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1999-08-19
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2000-11-28
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Rare birds documentation form
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Records Committee review for an Arctic Tern at Sandpiper Beach at Saylorville Reservoir in Polk County, IA on August 19, 1999. Includes a record review document with votes, and three documentation forms submitted to the committee.
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Dinsmore, Stephen J.
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Arctic Tern
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Sandpiper Recreation Area
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Saylorville Reservoir, Polk County, Iowa
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large reservoir
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The documentation form by Steve Dinsmore forms the basis of this record. Other documentation forms by Jim Dinsmore and Tom Kent were submitted. Other observers include Jim Sinclair and Dick Tetrault. | Elimination of similar species: The combination of smaller size, bill size, leg length, and wing pattern eliminates other Sterna, especially Common and Forster's Terns. | The original documentation form event lasted from 18:15:00/19:40:00.
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Iowa Ornithologists' Union | MS 166
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12
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2
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Records Committee review for rare bird sighting of Red Phalarope at Spirit Lake, 1996
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Administrative records Field notes Photographs
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Bird watching Ornithology Ornithology--Societies, etc
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1996-11-03
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2000-11-22
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Rare birds documentation form
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Records Committee review of a Red Phalarope at Spirit Lake in Dickinson County, IA on November 3, 1996. Includes a record review document with votes, three photos (one is a photocopy), and two documentation forms submitted to the committee.
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Schoenewe, Lee A.
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Red Phalarope
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Spirit Lake
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SE corner of Big Spirit Lake, Dickinson Co.
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Lakeshore
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The documentation form by Lee A. Schoenewe forms the basis of this record. Another documentation form by Ed Thelen was submitted. Other observers include Nancy Schoenewe, Harold White, Doug Harr, and Tim Waltz. | Elimination of similar species: Red-necked Phalarope - Bill shape and solid gray back. | The original documentation form event lasted from 15:30:00/16:45:00.
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Iowa Ornithologists' Union | MS 166
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10
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12
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Records Committee review for rare bird sighting of Pacific Loon at Black Hawk Lake, 1994
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Administrative records Field notes
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Bird watching Ornithology Ornithology--Societies, etc
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1994-11-07
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1996-04-25
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Rare birds documentation form
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Records Committee review of a Pacific Loon at Black Hawk Lake in Sac County, IA on November 7, 1994. Includes a record review document with votes and a documentation form submitted to the committee.
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Ernzen, Peter
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Pacific Loon
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Black Hawk Lake
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SE Corner of Blackhawk Lake in Sac Co.
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Lake
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The documentation form by Pete Ernzen is the only one submitted and forms the basis of this record. | Elimination of similar species: Common Loon longer no chin strap -neck border indistinct - Red-throated Loon bill upturned, white above eye speckled back. | The original documentation form event lasted from 16:22:00/16:35:00.
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Iowa Ornithologists' Union | MS 166
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7
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7
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