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Rare bird documentation form for Red-necked Grebe at Saylorville Reservoir, 1986
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1986-11-08
|
1986-11-22
|
Rare birds documentation form
|
Rare bird documentation for a Red-necked Grebe at Saylorville Reservoir in Polk County, IA on November 8, 1986.
|
Dinsmore, Stephen J.
|
Red-necked Grebe
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co.
|
large lake
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: The yellow bill, size, and light crescent on the cheek eliminates all other grebes. | The original documentation form event lasted from 12:15:00/12:20:00.
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Iowa Ornithologists' Union | MS 166
|
32
|
13
|
|
Rare bird documentation form for Red-necked Grebe at Saylorville Reservoir, 1986
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1986-11-24
|
1986-11-25
|
Rare birds documentation form
|
Rare bird documentation form for a Red-necked Grebe at Saylorville Reservoir in Polk County, IA on November 24, 1986.
|
Dinsmore, Stephen J.
|
Red-necked Grebe
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co.
|
large lake
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: Western Grebe eliminated by its longer neck, thinner bill, and lack of a white crescent on the cheek. | The original documentation form event lasted from 14:35:00/14:50:00.
|
Iowa Ornithologists' Union | MS 166
|
32
|
13
|
|
Records Committee review for rare bird sighting of Clark's Grebe at Saylorville Reservoir, 1987
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1987-10-01
|
1993-09-07
|
Rare birds documentation form
|
Records Committee review for a Clark's Grebe at Saylorville Reservoir in Polk County, IA on October 1, 1987. Includes a record review document with votes and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Clark's Grebe
|
Saylorville Dam
|
Saylorville Reservoir, Polk Co.-above dam
|
resting on large reservoir
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: Western Grebe eliminated on the basis of this birds paler flanks and white color on the face extending well above the eye. I saw numerous Western Grebes at Saylorville this fall, and none of them had nearly as much white on the face as the bird I saw on 1 Oct. | The original documentation form event lasted from 14:35:00/15:05:00.
|
Iowa Ornithologists' Union | MS 166
|
7
|
9
|
|
Rare bird documentation form for Surf Scoter at Polk City Wildlife Area, 1986
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1986-11-11
|
1986-11-13
|
Rare birds documentation form
|
Rare bird documentation form for a Surf Scoter at Polk City Wildlife Area in Polk County, IA on November 11, 1986.
|
Dinsmore, Stephen J.
|
Surf Scoter
|
Polk City Wildlife Area
|
Polk City WIldlife Area, Polk Co.
|
large body of water
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: White-winged Scoter eliminated by lack of white wing patch. Black Scoter eliminated by bill shape and lack of a large white cheek patch. | The original documentation form event lasted from 15:30:00/15:45:00.
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Iowa Ornithologists' Union | MS 166
|
33
|
11
|
|
Rare bird documentation form for Black-crowned Night Heron at Saylorville Reservoir, 1986
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1986-11-02
|
1986-11-16
|
Rare birds documentation form
|
Rare bird documentation form for a Black-crowned Night Heron at Saylorville Reservoir in Polk County, IA on November 2, 1986.
|
Dinsmore, Stephen J.
|
Black-crowned Night Heron
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co. (ponds below dam)
|
sitting in a willow along a pond
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. | Elimination of similar species: Yellow-crowned Night Heron was eliminated by the yellowish bill color and the streaking, not spotting, on the underparts. American Bittern was eliminated by size, bill shape, and lack of a black whisker mark. | The original documentation form event lasted from 09:15:00/09:20:00.
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Iowa Ornithologists' Union | MS 166
|
32
|
22
|
|
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 Thayer's Gull at Pool 19 on the Mississippi River near Montrose, 1988
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1988-12-31
|
1993-08-04
|
Rare birds documentation form
|
Records Committee review for a Thayer's Gull at Pool 19 on the Mississippi River near Montrose in Lee County, IA on December 31, 1988. Includes a record review document with votes and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Thayer's Gull
|
Pool 19
|
Pool 19 of Mississippi R., near Montrose, Lee Co., IA
|
resting on ice and flying over river with other gulls
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Another observer includes Bart Ballard. | Elimination of similar species: wing pattern, tail pattern, rounder head, and even color of body eliminates similar Herring Gull. | The original documentation form event lasted from 10:15:00/10:25:00.
|
Iowa Ornithologists' Union | MS 166
|
11
|
3
|
|
Records Committee review for rare bird sighting for Chestnut-collared Longspur north of Hendrickson Marsh, 1985
|
Administrative records Field notes
|
Bird watching Ornithology Ornithology--Societies, etc
|
1985-03-20
|
1993-09-03
|
Rare birds documentation form
|
Records Committee review for two Chestnut-collared Longspurs north of Hendrickson Marsh in Story County, IA on March 20, 1985. Includes a record review document with votes, a summary of the review, and a documentation form submitted to the committee.
|
Dinsmore, Stephen J.
|
Chestnut-collared Longspur
|
Hendrickson Marsh Wildlife Management Area
|
1.5 miles north of Hendrickson Marsh, Story Co.
|
low area in a soybean stubble field
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Another observer was Gordon Brown. | Elimination of similar species: Distinguished from Smith's and McCown's Longspurs by reddish neck band and extensive black on belly. Distinguished from Lapland Longspur by extensive black on belly, black earmark contrasting with white cheek, yellow on throat and lack of streaking on sides. | The original documentation form event lasted from 17:15:00/17:45:00.
|
Iowa Ornithologists' Union | MS 166
|
13
|
43
|
|
Rare bird documentation form for Greater Scaup at Big Creek State Park, 1988
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1988-05-17
|
1988-05-27
|
Rare birds documentation form
|
Rare bird documentation form for one to two Greater Scaups at Big Creek State Park in Polk County, IA on May 17, 1988.
|
Dinsmore, Stephen J.
|
Greater Scaup
|
Big Creek State Park
|
Big Creek State Park, Polk Co.
|
with other ducks near muddy area at north end of lake
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Andrew Fix. | Elimination of similar species: Lesser Scaup eliminated above. The birds were bigger than nearby Blue-winged Teal, but smaller than a Mallard. Identified the bird as a Greater Scaup by the very large, almost spatulate bill, very wide bill nail, large size compared to a Mallard (the bird wasn't much smaller than the Mallard), rounded head (not peaked like a Lesser Scaup), and white wing stripe extending on to the primaries (seen when the bird preened). | The original documentation form event lasted from 10:05:00/10:22:00.
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Iowa Ornithologists' Union | MS 166
|
33
|
10
|
|
Rare bird documentation form for Black Scoter at Saylorville Reservoir, 1987
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1987-10-25
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for two Black Scoters at Saylorville Reservoir in Polk County, IA on October 25, 1987.
|
Dinsmore, Stephen J.
|
Black Scoter
|
Saylorville Lake
|
Saylorville Reservoir, Polk Co.-off Jester Park
|
swimming with other ducks on large reservoir
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Andrew S. Fix and Paul Martsching. | Elimination of similar species: Other scoters eliminated by the dark wings and the distinct throat patch. | The original documentation form event lasted from 12:30:00/12:50:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
13
|
|
Rare bird documentation form for Great Black-backed Gull at Saylorville Reservoir, 1987
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1987-11-07
|
1987-11-26
|
Rare birds documentation form
|
Rare bird documentation form for a Great Black-backed Gull at Saylorville Reservoir in Polk County, IA on November 7, 1987.
|
Dinsmore, Stephen J.
|
Great Black-backed Gull
|
Saylorville Lake
|
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. Other observers include Andrew S. 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 10:15:00/10:20:00.
|
Iowa Ornithologists' Union | MS 166
|
34
|
38
|
|
Rare bird documentation form for Black Scoter at DeSoto National Wildlife Refuge, 1987
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1987-10-31
|
1987-11-26
|
Rare birds documentation form
|
Rare bird documentation form for six Black Scoters at DeSoto National Wildlife Refuge in Harrison County, IA on October 31, 1987.
|
Dinsmore, Stephen J.
|
Black Scoter
|
DeSoto National Wildlife Refuge
|
DeSoto NWR, Harrison Co.-seen on both Iowa and Nebraska sides of oxbow at the Lakeview overlook
|
swimming on lake with other ducks
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Andy Fix and fourteen members of the Big Bluestem Audubon Society. | Elimination of similar species: Other scoters eliminated by the white patch on the throat and by the dark wings (seen on only one bird). Note that we had four Surf Scoters for direct comparison. | The original documentation form event lasted from 10:00:00/10:40:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
13
|
|
Rare bird documentation form for Horned Grebe at Oakland, 1987
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1987-08-16
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Horned Grebe at Oakland in Pottawattamie County, IA on August 16, 1987.
|
Dinsmore, Stephen J.
|
Horned Grebe
|
Oakland
|
lagoons at Oakland, Pottawattamie Co.
|
swimming and feeding on small lagoon
|
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: Eared Grebe eliminated by the thicker bill, flatter crown, and entirely white throat and breast. | The original documentation form event occurred in the late afternoon.
|
Iowa Ornithologists' Union | MS 166
|
32
|
12
|
|
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.
|
Iowa Ornithologists' Union | MS 166
|
10
|
3
|
|
Rare bird documentation form for Vesper Sparrow northeast of Ames, 1989
|
Field notes
|
Birds--Behavior Birds--Identification Ornithology Rare birds
|
1989-12-16
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Vesper Sparrow northeast of Ames in Story County, IA on December 16, 1989.
|
Dinsmore, Stephen J.
|
Vesper Sparrow
|
Ames
|
5 mi. east and 2 mi. north of Ames, Story Co., IA
|
sitting on gravel road in agricultural area
|
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: The white eye ring, tail pattern, pattern of streaking on the breast, and habitat eliminates other sparrows, especially Savannah, Song, and Lincoln's. | The original documentation form event lasted from 14:40:00/14:56:00.
|
Iowa Ornithologists' Union | MS 166
|
35
|
52
|
|
Rare bird documentation form for Sandhill Crane at Polk City Wildlife Area, 1986
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1986-11-22
|
1986-11-24
|
Rare birds documentation form
|
Rare bird documentation form for a Sandhill Crane at Polk City Wildlife Area in Polk County, IA on November 22, 1986.
|
Dinsmore, Stephen J.
|
Sandhill Crane
|
Polk City Wildlife Area
|
Polk City Wildlife Area, Polk Co. (part of Saylorville Reservoir)
|
sitting on ice and wading in small patch of open water
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include B.J. Rose, Loren Padelford, Babs Padelford, James Dinsmore, and Bob Myers. | Elimination of similar species: The gray color, red crown, and heron profile eliminate Great Blue Heron. | The original documentation form event lasted from 15:00:00/15:15:00 and 16:15:00/16:30:00.
|
Iowa Ornithologists' Union | MS 166
|
34
|
1
|
|
Rare bird documentation form for Peregrine Falcon at Anderson Goose Lake, 1983
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1983-05-14
|
1983-05-15
|
Rare birds documentation form
|
Rare bird documentation form for a Peregrine Falcon at Anderson Goose Lake in Hamilton County, IA on May 14, 1983.
|
Dinsmore, Stephen J.
|
Peregrine Falcon
|
Anderson Goose Lake
|
Anderson Lake, Hamilton Co.
|
Flying over a lake/marsh area
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Barney Cook, Mike Nolan, and Steve Richards. | Elimination of similar species: Merlin - smaller size, no hood, more slender appearance. Prairie Falcon - no hood, brown back, top of wings, tail. Coopers + Sharp-shinned Hawks - barring on breast, broader wings and feathered tips of wings. Also, lighter back and tops of wings. | The original documentation form event lasted from 11:30:00/11:35:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
34
|
|
Rare bird documentation form for Whimbrel at Riverton Area, 1987
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1987-08-01
|
1987-11-26
|
Rare birds documentation form
|
Rare bird documentation form for a Whimbrel at Riverton Area in Fremont County, IA on August 1 - 2, 1987.
|
Dinsmore, Stephen J.
|
Whimbrel
|
Riverton Wildlife Management Area
|
Riverton A., Fremont Co.
|
feeding on large 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 Bart Ballard and Ross Silcock. | Elimination of similar species: No other shorebird has the combination of large size, long, decurved bill, dark eyeline, and buffy flight feathers. | The original documentation form event lasted from 14:10:00/16:00:00.
|
Iowa Ornithologists' Union | MS 166
|
34
|
12
|
|
Rare bird documentation form for Greater Yellowlegs at Riverton Wildlife Area, 1988
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1988-03-06
|
1988-03-27
|
Rare birds documentation form
|
Rare bird documentation form for a Greater Yellowlegs at Riverton Wildlife Area in Fremont County, IA on March 6, 1988.
|
Dinsmore, Stephen J.
|
Greater Yellowlegs
|
Riverton Wildlife Management Area
|
Riverton W.A., Fremont Co.
|
feeding with Killdeer on mudflat
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Bart Ballard, Ross Silcock, Babs Padelford, and Loren Padelford. | Elimination of similar species: The size, yellow legs, long bill, and body color eliminates all other shorebirds except Lesser Yellowlegs. Lesser Yellowlegs was eliminated by the call, the large size, and the bill shape. | The original documentation form event lasted from 09:45:00/10:30:00.
|
Iowa Ornithologists' Union | MS 166
|
34
|
7
|
|
Rare bird documentation form for Tundra Swan at Pool 19, 1988
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1988-12-31
|
1989-01-01
|
Rare birds documentation form
|
Rare bird documentation form for seven Tundra Swans at Pool 19 near Montrose in Lee County, IA on December 31, 1988.
|
Dinsmore, Stephen J.
|
Tundra Swan
|
Pool 19
|
Pool 19 of Mississippi R. near Montrose, Lee Co., IA
|
resting on ice on river
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Bart Ballard. | Elimination of similar species: Neck posture and bill shape eliminates Trumpeter and Mute swan. | The original documentation form event lasted from 10:15:00/11:30:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
1
|
|
Rare bird documentation form for Prairie Falcon at Red Rock Reservoir, 1988
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1988-02-06
|
1988-02-08
|
Rare birds documentation form
|
Rare bird documentation form for a Prairie Falcon at Red Rock Reservoir in Marion County, IA on February 6, 1988.
|
Dinsmore, Stephen J.
|
Prairie Falcon
|
Lake Red Rock
|
Red Rock Reservoir, Marion Co.-near north Elk Rock State Park
|
perched in dead trees over ice
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Bart Ballard. | Elimination of similar species: The large size eliminates American Kestrel and Merlin. The black axillaries, dark whisker, and light crown eliminate Peregrine Falcon and Gyrfalcon | The original documentation form event lasted from 16:18:00/17:05:00.
|
Iowa Ornithologists' Union | MS 166
|
33
|
35
|
|
Rare bird documentation form for Prairie Falcon southeast of Kelley, 1986
|
Field notes
|
Birds--Identification Ornithology--Societies, etc Rare birds
|
1986-12-16
|
N/A
|
Rare birds documentation form
|
Rare bird documentation form for a Prairie Falcon southeast of Kelley in Story County, IA on December 16, 1986.
|
Dinsmore, Stephen J.
|
Prairie Falcon
|
Kelley
|
2 mi. s and 1 mi. e of Kelly [sic], Story Co.
|
perched in a tree over a large, grassy field
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Bart Ballard. | Elimination of similar species: The long tail and pointed wings make the bird a falcon of some sort. The size eliminates Merlin and Am. Kestrel. The black axillaries eliminate Peregrine Falcon and Gyrfalcon. | The original documentation form event lasted from 11:07:00/11:13:00 on December 16 and 08:10:00/08:23:00 on December 17.
|
Iowa Ornithologists' Union | MS 166
|
33
|
35
|
|
Rare bird documentation for Western Sandpiper at Roberts Creek area in Red Rock Reservoir, 1987
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1987-09-27
|
N/A
|
Rare birds documentation form
|
Rare bird documentation for a Western Sandpiper at Roberts Creek area in Red Rock Reservoir in Marion County, IA on September 27, 1987.
|
Dinsmore, Stephen J.
|
Western Sandpiper
|
Roberts Creek
|
Red Rock Reservoir, Marion co.-Roberts Creek area
|
feeding with other shorebirds on muddy area
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Bart Ballard. | Elimination of similar species: The long, drooped bill, rufous scapulars, and feeding method rules out Semipalmated Sandpiper and other peeps. | The original documentation form event lasted from 14:26:00/14:56:00.
|
Iowa Ornithologists' Union | MS 166
|
34
|
18
|
|
Rare bird documentation form for Pectoral Sandpiper at Big Creek State Park, 1987
|
Field notes
|
Birds--Identification Ornithology Rare birds
|
1987-12-01
|
1987-12-04
|
Rare birds documentation form
|
Rare bird documentation form for a Pectoral Sandpiper at Big Creek State Park in Polk County, IA on December 1, 1987.
|
Dinsmore, Stephen J.
|
Pectoral Sandpiper
|
Big Creek State Park
|
Big Creek State Park, Polk Co.
|
mudflat area at north end of lake
|
The documentation form by Steve Dinsmore is the only one submitted and forms the basis of this record. Other observers include Bart Ballard. | Elimination of similar species: The size, yellowish legs, and well defined 'necklace' eliminates all other shorebirds except Sharp-tailed Sandpiper. The fact the the [sic] eyeline did not broaden behind the eye and the streaked rather than buffy breast eliminates Sharp-tailed Sandpiper. | The original documentation form event lasted from 16:35:00/16:45:00.
|
Iowa Ornithologists' Union | MS 166
|
34
|
23
|
|
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
|