UID
Digital Object Type Rare birds documentation form
Content DM Link https://n2t.net/ark:/87292/w9fq9q78p
Type Text
Description Records Committee review for two Thayer's Gulls at Coralville Dam in Johnson County, IA on November 7, 1981. Includes a record review document with votes, correspondence and commentary about the sighting, and a documentation form submitted to the committee.
Related Genres Administrative records Correspondence Field notes
Sort Date 1981-11-07 - 1993-08-26
People / Organizations
Time 9:25 AM
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Collection Iowa Ornithologists' Union | MS 166
Box 11
Folder 3
Contributing Institution Iowa State University Library Special Collections and University Archives
Creator / Author Kent, Thomas H. (Thomas Hugh), 1934-
Contributors Paulson, Dennis R. Dunn, Jonathan L. Lehman, Paul Newlon, Michael C. Wahl, Terrence R. Iowa Ornithologists' Union Records Committee Peterjohn, Bruce G.
Topics Bird watching Ornithology Ornithology--Societies, etc
Birds Thayer's Gull
Locations Coralville Dam
Map
Verbatim Locality Coralville Res. Dam, west overlook, Johnson Co. Iowa
Location Remarks The documentation forms do not include georeferences
Habitat Reservoir, just above dam, in water and on swimming beach
Extent 8 pages
Language(s) eng
Bibliographic Citation
Information Withheld
Individual Count 2
Occurrence Remarks The documentation form by Thomas H. Kent is the only one submitted and forms the basis of this record. Other observers include Carl Bendorf, Mike Newlon, and many unidentified other observers. | Elimination of similar species: Photographs taken at the first encounter with a Celestron 750 mm lens demonstrate the size difference, the bill and head shape difference, the lighter overall color, and the window in the wing. An adult Herring was in the photo with the Thayer's on 7 Nov and imm Herring were photographed on 10 Nov for comparison. | The original documentation form event lasted from 09:25:00/09:50:00 and 11:00:00/11:20:00 on November 7, 1981 and 07:30:00/08:30:00 on November 8, 1981.
Occurrence Status present
Field Number 1981-14
Event Remarks Viewing Conditions: Sunny, early AM light with sun at about right angle to right. 50-300 yards (est). 8x binoculars, 20x scope, 15x lens on camera.
Supporting Documentation
Date Digital 30 May 2017
File Type image/jpeg
Hardware / Software Epson - sheet feed