UID
Digital Object Type Rare birds documentation form
Content DM Link https://n2t.net/ark:/87292/w9nc5sf9k
Type Text
Description 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.
Related Genres Administrative records Field notes
Sort Date 1990-09-03 - 1993-07-17
People / Organizations
Time 4:22 PM
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Data License http://creativecommons.org/publicdomain/zero/1.0
Collection Iowa Ornithologists' Union | MS 166
Box 10
Folder 16
Contributing Institution Iowa State University Library Special Collections and University Archives
Creator / Author Dinsmore, Stephen J.
Contributors Iowa Ornithologists' Union Records Committee
Topics Bird watching Ornithology Ornithology--Societies, etc
Birds Parasitic Jaeger
Locations Cherry Glen Recreation Area
Map
Verbatim Locality Saylorville Reservoir, Polk Co.-off Cherry Glen Recreation Area
Location Remarks The documentation forms do not include georeferences
Habitat
Extent 3 pages
Language(s) eng
Bibliographic Citation
Information Withheld
Individual Count 1
Occurrence Remarks 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.
Occurrence Status present
Field Number 1990-30
Event Remarks Viewing Conditions: Viewing conditions were excellent with the sun mostly behind me. Estimated viewing distance was 200 yards. I used a Buschnell 20-45x spotting scope.
Supporting Documentation National Geographic Society. National geographic field guide to the birds of North America. Washington D.C.: National Geographic Society.
Date Digital 24 May 2017
File Type image/jpeg
Hardware / Software Epson - sheet feed