UID
Digital Object Type Rare birds documentation form
Content DM Link https://n2t.net/ark:/87292/w92v2cc94
Type Text
Description Records Committee review for a Mew Gull at Red Rock Reservoir Dam in Marion County, IA on December 20, 1997. Includes a record review document with votes and two documentation forms submitted to the committee.
Related Genres Administrative records Field notes
Sort Date 1997-12-20 - 2000-11-24
People / Organizations
Time 3:30 PM
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Collection Iowa Ornithologists' Union | MS 166
Box 10
Folder 23
Contributing Institution Iowa State University Library Special Collections and University Archives
Creator / Author Dinsmore, Stephen J.
Contributors Overton, Michael D. Iowa Ornithologists' Union Records Committee
Topics Bird watching Ornithology Ornithology--Societies, etc
Birds Mew Gull
Locations Red Rock Dam
Map
Verbatim Locality Red Rock Reservoir, Marion Co., IA
Location Remarks The documentation forms do not include georeferences
Habitat large reservoir
Extent 3 pages
Language(s) eng
Bibliographic Citation
Information Withheld
Individual Count 1
Occurrence Remarks The documentation form by Stephen J. Dinsmore forms the basis of this record. Another documentation form by Michael D. Overton was submitted. Other observers include Maridel Jackson, Ann Johnson, Aaron Brees, Gordon Brand, and many other unidentified observers. | 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 15:30:00/16:40:00.
Occurrence Status present
Field Number 1997-54
Event Remarks Viewing Conditions: Viewing conditions were good with clear skies. Estimated viewing distance was 500m. I used a 20-60x spotting scope.
Supporting Documentation National Geographic Society. National geographic field guide to the birds of North America. Washington D.C.: National Geographic Society. | Grant, PJ. Gulls: a guide to identification. Cambridge, MA: Academic Press.
Date Digital 26 May 2017
File Type image/jpeg
Hardware / Software Epson - sheet feed