UID
Digital Object Type Rare birds documentation form
Content DM Link https://n2t.net/ark:/87292/w95q4rp4m
Type Text
Description Records Committee review for a Western Gull east of Lock and Dam 15 near Davenport in Scott County, IA on December 11, 1989. Includes a record review document with votes, correspondence relevant to bird sighting and review, and three documentation forms submitted to the committee.
Related Genres Administrative records Correspondence Field notes
Sort Date 1989-12-11 - 1993-08-06
People / Organizations
Time 3:30 PM
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Collection Iowa Ornithologists' Union | MS 166
Box 11
Folder 7
Contributing Institution Iowa State University Library Special Collections and University Archives
Creator / Author Petersen, Peter C.
Contributors Bendorf, Carl J. Blevins, Brian L. White, Gerald Iowa Ornithologists' Union Records Committee
Topics Bird watching Ornithology Ornithology--Societies, etc
Birds Western Gull
Locations Lock and Dam 15
Map
Verbatim Locality On Miss. River chanel [sic] ice between Davenport, Scott Co. IA &+ Rock Isl. Arsenal, RI Co. IL.
Location Remarks The documentation forms do not include georeferences
Habitat On ice covered chanel [sic] of Mississippi - 1/4 - 1/2 mi. upstream (East) of Lock + Dam 15.
Extent 11 pages
Language(s) eng
Bibliographic Citation
Information Withheld
Individual Count 1
Occurrence Remarks The documentation form by Peter C. Petersen forms the basis of this record. Other documentation forms by Brian Blevins and Gerald White were submitted. Another observers includes Lewis Blevins. | Elimination of similar species: Slaty-backed Gull - Gray mantle merged directly to black tips, trailing white wing edge too narrow, mantle color too dark for g.b. Lesser-Black-bkd Gull - leg color pink, bird too large + heavy Greater Black-bkd. Gull - Bird too small, back not black enough, legs too bright + pink. | The original documentation form event lasted from 15:30:00/15:35:00 on December 11, 1986, 08:20:00/08:25:00 and 09:00:00/09:15:00 on December 12, 1986.
Occurrence Status present
Field Number 1989-55
Event Remarks Viewing Conditions: Optical equipment: 10x40 Zeiss binocs. Swift scope at 30-40x60. Distance: 100 m. est. Lighting: P.M. obs. - sun 90° to side - obs. in IA. AM obs. - Sun directly behind obs. obs in IL.
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. | Harrison P. Seabirds: an identification guide. New York: Houghton Mifflin Harcourt.
Date Digital 01 Jun 2017
File Type image/jpeg
Hardware / Software Epson - sheet feed