UID
Digital Object Type Rare birds documentation form
Content DM Link https://n2t.net/ark:/87292/w9bg2hc9g
Type Text
Description 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.
Related Genres Administrative records Clippings (information artifacts) Field notes
Sort Date 1988-09-28 - 1993-08-04
People / Organizations
Time 12:24 PM
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Data License http://creativecommons.org/publicdomain/zero/1.0
Collection Iowa Ornithologists' Union | MS 166
Box 10
Folder 15
Contributing Institution Iowa State University Library Special Collections and University Archives
Creator / Author Dinsmore, Stephen J.
Contributors Kent, Thomas H. (Thomas Hugh), 1934- Myers, Robert K. Petersen, Peter C. Proescholdt, Beth Proescholdt, Mark Iowa Ornithologists' Union Records Committee
Topics Bird watching Ornithology Ornithology--Societies, etc
Birds Pomarine Jaeger
Locations Saylorville Lake
Map
Verbatim Locality Saylorville Reservoir, Polk Co.-south end of lake
Location Remarks The documentation forms do not include georeferences
Habitat resting and feeding on large reservoir
Extent 12 pages
Language(s) eng
Bibliographic Citation
Information Withheld
Individual Count 2
Occurrence Remarks 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.
Occurrence Status present
Field Number 1988-24
Event Remarks Viewing Conditions: Viewing conditions were rather poor on 28 Sep with rain and fog severely limiting visibility. Viewing conditions were excellent on later dates. Estimated viewing distance was as close as 4-5 feet for one bird. I used a Buschnell 20-45x spotting scope and Bausch and Lomb 8x40 binoculars.
Supporting Documentation National Geographic Society. National geographic field guide to the birds of North America. Washington D.C.: National Geographic Society. | Peterson RT. Field guide to birds of Eastern North America. New York: Houghton Mifflin Harcourt. | Harrison P. Seabirds: an identification guide. New York: Houghton Mifflin Harcourt.
Date Digital 24 May 2017
File Type image/jpeg
Hardware / Software Epson - sheet feed