UID
Digital Object Type Rare birds documentation form
Content DM Link https://n2t.net/ark:/87292/w95d8nh6h
Type Image, Text
Description Records Committee review for two Iceland Gulls at Lock and Dam 14 near Le Claire in Scott County, IA on January 4, 1992. Includes a record review document with votes, two photographs, an article in Iowa Bird Life, and two documentation forms submitted to the committee.
Related Genres Administrative records Clippings (information artifacts) Field notes Photographs
Sort Date 1992-01-04 - 1994-10-18
People / Organizations
Time 11:30 AM
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Collection Iowa Ornithologists' Union | MS 166
Box 11
Folder 4
Contributing Institution Iowa State University Library Special Collections and University Archives
Creator / Author Kent, Thomas H. (Thomas Hugh), 1934-
Contributors Petersen, Peter C. Iowa Ornithologists' Union Records Committee
Topics Bird watching Ornithology Ornithology--Societies, etc
Birds Iceland Gull
Locations Lock and Dam 14
Map
Verbatim Locality Lock and Dam 14, Scott Co. Iowa
Location Remarks The documentation forms do not include georeferences
Habitat Mississippi River
Extent 10 pages
Language(s) eng
Bibliographic Citation
Information Withheld
Individual Count 2
Occurrence Remarks The documentation form by Thomas H. Kent is the earliest and the one that forms the basis of this record. Another documentation form by Peter C. Petersen was submitted later. Other observers include Dan Dorrance and many unidentified observers. | Elimination of similar species: The overall size, head size, bill size, and lack of dipped-in-ink effect on the bill tip exclude Glaucous Gull. I excluded Thayer's Gull because both of these birds had very light primaries (not dark webs on the outer primaries). Neither had a secondary bar or in fact any distinctive marking on the wings. The lack of tail band in the first year bird also excludes Thayer's Gull. I was impressed by the paleness of the gray mantle in the second-year bird, but have too little experience with older Thayer's Gulls to make a comparison. | The original documentation form event lasted from 11:30:00/12:30:00.
Occurrence Status present
Field Number 1992-04
Event Remarks Viewing Conditions: Light: Heavy overcast with soft gray lighting. Distance: 40 to 150 yards. Optics: 10x binocular, 20x scope.
Supporting Documentation
Date Digital 30 May 2017
File Type image/jpeg
Hardware / Software Epson - sheet feed