UID
Digital Object Type Rare birds documentation form
Content DM Link https://n2t.net/ark:/87292/w93r0pw74
Type Text
Description Records Committee review of a Red Knot at Sand Point in Coralville Reservoir in Johnson County, IA on September 16, 1984. Includes a record review document with votes and four documentation forms submitted to the committee.
Related Genres Administrative records Field notes
Sort Date 1984-09-16 - 1993-09-01
People / Organizations
Time
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Data License http://creativecommons.org/publicdomain/zero/1.0
Collection Iowa Ornithologists' Union | MS 166
Box 10
Folder 1
Contributing Institution Iowa State University Library Special Collections and University Archives
Creator / Author Newlon, Michael C.
Contributors Kent, Thomas H. (Thomas Hugh), 1934- Bendorf, Carl J. Iowa Ornithologists' Union Records Committee
Topics Bird watching Ornithology Ornithology--Societies, etc
Birds Red Knot
Locations Sand Point
Map
Verbatim Locality Sand Point, Coralville Res., Johnson Co., Iowa
Location Remarks The documentation forms do not include georeferences
Habitat mudflats
Extent 7 pages
Language(s) eng
Bibliographic Citation
Information Withheld
Individual Count 1
Occurrence Remarks The documentation form with an attachment by Michael Newlon is the one that forms the basis of this record. Other documentation forms by Thomas H. Kent and two documentation forms for two separate sightings by Carl Bendorf. | Elimination of similar species: Build, pale wings + color pattern, feather pattern on back/coverts distinctive. [...] No other calidrine sandpiper likely to be found in Iowa combines the coloration, size, and proportions of the Knot. The only species that combine the overall grey coloration and the heavy straight bill are Sanderling, much smaller, and Willet, much larger and longer-legged, with blue-grey rather than black bill and legs. The other shorebirds that are remotely similar are the Tattlers, which have more slender bills and paler legs; basic-plumaged Surfbird, which has a shorter, thicker bill, yellow at base, pale legs, and less-distinct face-pattern (but similar pattern on coverts/ scapulars/tertials); Great knot, which is supposed to lack a distinct supercilium, have round black spots on chest and flanks, black upperparts, a longer, more slender bill. .
Occurrence Status present
Field Number 1984-25
Event Remarks Viewing Conditions: 20-70 yds. 25x60 scope. Sun behind observer. [...] range varied between estimated 20-100 yards. Good sunlight at an angle of about 80-120 degrees to the bird. Optics used were a 25x60 Bushnell scope and 8x40 Leitz trinovid binoculars.
Supporting Documentation Simmons KEL, Ferguson-Lees IJ, Gillmor R, Hollom PAD, Hudson R, Nicholson EM, Ogilvie MA, Olney PJS, Voous KH, Wattel J. Cramp, editor. Handbook of the birds of Europe the Middle East and North Africa. Vol. 3, waders to gulls. New York: Oxford University Press. | Prater T, Marchant J, and Vuorinen J. Guide to the identification and ageing of holarctic waders. Norfolk (UK): British Trust for Ornithology. | Armstrong RH. Guide to the birds of Alaska. Porland, OR: Alaska Northwest.
Date Digital 23 May 2017
File Type image/jpeg
Hardware / Software Epson - sheet feed