UID
Digital Object Type Rare birds documentation form
Content DM Link https://n2t.net/ark:/87292/w93r0pw8m
Type Text
Description Records Committee review for a Great Black-backed Gull at Red Rock Reservoir in Marion County, IA on December 3, 1986. Includes a record review document with votes and a documentation submitted to the committee.
Related Genres Administrative records Field notes
Sort Date 1986-12-03 - 1993-09-07
People / Organizations
Time 2:35 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 Petersen, Peter C.
Contributors Iowa Ornithologists' Union Records Committee
Topics Bird watching Ornithology Ornithology--Societies, etc
Birds Great Black-backed Gull
Locations Lake Red Rock
Map
Verbatim Locality Seen from Hwy 14 bridge across Red Rock Res.
Location Remarks The documentation forms do not include georeferences
Habitat
Extent 2 pages
Language(s) eng
Bibliographic Citation
Information Withheld
Individual Count 1
Occurrence Remarks The documentation by Peter C. Petersen is the only one submitted and forms the basis of this record. Another observer includes Gil Sandvick. | Elimination of similar species: [...] Herring Gull eliminated by large size, small amount of dark brown on tail, light head + rump. Also lacked light area on inner primaries noted in the nearby Herring Gull. | The original documentation form event lasted from 14:35:00/14:35:30.
Occurrence Status present
Field Number 1986-32
Event Remarks Viewing Conditions: [...] Seen from about 100-120 meters with 10X40 + 7X35 binoculars Sun directly behind observers + shining on bird.
Supporting Documentation National Geographic Society. National geographic field guide to the birds of North America. Washington D.C.: National Geographic Society. | Harrison P. Seabirds: an identification guide. New York: Houghton Mifflin Harcourt. | Grant, PJ. Gulls: a guide to identification. Cambridge, MA: Academic Press. | Farrand J. The Audubon society master guide to birding, vol. 2, gulls to dippers. New York: Alfred A. Knopf, Inc.
Date Digital 01 Jun 2017
File Type image/jpeg
Hardware / Software Epson - sheet feed