UID
Digital Object Type Rare birds documentation form
Content DM Link https://n2t.net/ark:/87292/w9804xn4x
Type Text
Description Records Committee review for a Laughing Gull at Lake Rathbun in Appanoose County, IA on June 4, 1991. Includes a record review document with votes and a documentation form submitted to the committee.
Related Genres Administrative records Field notes
Sort Date 1991-06-04 - 1993-07-17
People / Organizations
Time 10:19 AM
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Data Access Rights http://vertnet.org/resources/norms.html
Data License http://creativecommons.org/publicdomain/zero/1.0
Collection Iowa Ornithologists' Union | MS 166
Box 10
Folder 18
Contributing Institution Iowa State University Library Special Collections and University Archives
Creator / Author Cummins, Raymond L.
Contributors Iowa Ornithologists' Union
Topics Bird watching Ornithology Ornithology--Societies, etc
Birds Laughing Gull
Locations Rathbun Lake
Map
Verbatim Locality Lake Rathbun Appanoose Co.
Location Remarks The documentation forms do not include georeferences
Habitat Lake and shore.
Extent 2 pages
Language(s) eng
Bibliographic Citation
Information Withheld
Individual Count 1
Occurrence Remarks The documentation form by Raymond Cummins is the only one submitted and forms the basis of this record. | Elimination of similar species: Of the medium sized Gulls only Ring-billed, Franklin's, and Mew Gulls have similar juvenile plumages. The direct size comparison, seen gull being smaller, bill shape and dark color, and lack of white in head eliminates Ring-billed Gull. Mew Gull is eliminated by long dark bill, Ring-billed like jist of bird in flight, and uniform overall color. The long down turned bill and the total improbability of a juvenile Franklin's being in southern Iowa on this date. | The original documentation form event lasted from 10:19:00/10:30:30 on June 4, 1991 and 09:30:00/09:35:00 on June 5, 1991.
Occurrence Status present
Field Number 1991-30
Event Remarks Viewing Conditions: Good light at 200yds closest to 500yds on flying gull. Poor light at 350yds on setting gull.
Supporting Documentation National Geographic Society. National geographic field guide to the birds of North America. Washington D.C.: National Geographic Society.
Date Digital 26 May 2017
File Type image/jpeg
Hardware / Software Epson - sheet feed/flatbed