UID
Digital Object Type Rare birds documentation form
Content DM Link https://n2t.net/ark:/87292/w9707wr36
Type Text
Description Records Committee review for a Great Black-backed Gull at Lake Manawa in Pottawattamie County, IA on December 6, 1978. Includes a record review document with votes, articles in Nebraska Bird Review, Iowa Bird Life, and American Birds, and two documentation forms submitted to the committee.
Related Genres Administrative records Clippings (information artifacts) Field notes
Sort Date 1978-12-06 - 1993-08-19
People / Organizations
Time 4:30 PM
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Collection Iowa Ornithologists' Union | MS 166
Box 11
Folder 8
Contributing Institution Iowa State University Library Special Collections and University Archives
Creator / Author Green, Ruth
Contributors Kovanda, James, Jr. Kovanda, Sandra Iowa Ornithologists' Union Records Committee
Topics Bird watching Ornithology Ornithology--Societies, etc
Birds Great Black-backed Gull
Locations Lake Manawa
Map
Verbatim Locality Lake Manawa, Council Bluffs, Iowa
Location Remarks The documentation forms do not include georeferences
Habitat Most of Lake Manawa was frozen over at this time but there were small patches of open water. The bird was standing on the ice at the edge of one of these patches.
Extent 6 pages
Language(s) eng
Bibliographic Citation
Information Withheld
Individual Count 1
Occurrence Remarks The documentation form by Ruth Green forms the basis of this record. Another documentation form by Sandra S. Kovanda and James Kovanda, Jr. was submitted. | Elimination of similar species: There were only two gulls at this time there--this bird and the glaucous. | The original documentation form event lasted from approximately 16:30:00/17:00:00.
Occurrence Status present
Field Number 1981-AY
Event Remarks Viewing Conditions: Distance: I can only estimate that it was between 300 and 400 feet from my viewing point on the shore. Optical equipment: I could see the bird very well through Bushnell 7 x 35 Wide-angle binoculars but I studied this bird carefully through a Baush & Lomb Spotting Scope on 30 power. It could be seen almost equally as well on both 15 and 20 power hoever [sic]. Light: I was facing east as I was studying the bird, the afternoon sun was to my back which provided very good lighting conditions.
Supporting Documentation Robbins CS, Bruun B, Zim HS. Birds of North America: a guide to field identification. New York: Golden Guides from St. Martin's Press. | Peterson, RT. Peterson field guide to birds of North America. New York: Houghton Mifflin Harcourt.
Date Digital 01 Jun 2017
File Type image/jpeg
Hardware / Software Epson - sheet feed