| UID |
|
| Digital Object Type |
Rare birds documentation form |
| Content DM Link |
https://n2t.net/ark:/87292/w9rx93g7r |
| Type |
Text |
| Description |
Records Committee review for two or more Thayer's Gulls at Saylorville Reservoir Dam in Polk County, IA on December 2, 1987. Includes a record review document with votes and five documentation forms submitted to the committee. |
| Related Genres |
Administrative records Field notes |
| Sort Date |
1987-12-02 - 1993-09-07 |
| People / Organizations |
|
| Time |
8:00 AM |
| Rights |
This complex item has mixed rights protection. Portions in which Iowa State University is the copyright holder are made available for non-commercial use, including sharing and adapting the work. No permission is required for non-commercial use to these portions so long as attribution is provided. All other uses of these portions, including commercial, require permission from the Iowa State University Library Special Collections and University Archives (archives@iastate.edu). (CC BY-NC 4.0 International). Portions in which Iowa State University is not the copyright holder are believed to be under copyright, but either (a) no rights-holder(s) have been identified or (b) one or more rights-holder(s) have been identified but none have been located. If you have any information that can contribute to identifying or locating the rights-holder(s) please notify the Iowa State University Library Digital Initiatives Program (digital@iastate.edu). (Rightsstatements.org InC-RUU 1.0). The original object is available at the Iowa State University Library Special Collections and University Archives (archives@iastate.edu). |
| Data Access Rights |
http://vertnet.org/resources/norms.html |
| Data License |
http://creativecommons.org/publicdomain/zero/1.0 |
| Collection |
Iowa Ornithologists' Union | MS 166 |
| Box |
11 |
| Folder |
3 |
| Contributing Institution |
Iowa State University Library Special Collections and University Archives |
| Creator / Author |
Dinsmore, Stephen J. |
| Contributors |
Moore, Francis L. Proescholdt, Mark Iowa Ornithologists' Union Records Committee |
| Topics |
Bird watching Ornithology Ornithology--Societies, etc |
| Birds |
Thayer's Gull |
| Locations |
Saylorville Dam |
| Map |
|
| Verbatim Locality |
Saylorville Reservoir, Polk Co. |
| Location Remarks |
The documentation forms do not include georeferences |
| Habitat |
sitting on ice with other gulls |
| Extent |
7 pages |
| Language(s) |
eng |
| Bibliographic Citation |
|
| Information Withheld |
|
| Individual Count |
2 |
| Occurrence Remarks |
The documentation form by Steve Dinsmore forms the basis of this record. Other documentation forms by Francis L. Moore, Steve Dinsmore, and Mark Proescholdt were submitted. Other observers include Andy Fix, Beth Proescholdt, Eugene Armstrong, Eloise Armstrong, Bob Cecil, Bery Engebretsen, Jim Sinclair, and many unidentified observers. | Elimination of similar species: The overall dark color of the bird and the lack of paler wingtips eliminates first-winter Iceland Gull. The translucent flight feathers, uniform body color, lack of a "window" on the upperwing, smaller, thinner bill, rounder head, dark smudge around the eye, and smaller size eliminates first-winter Herring Gull. The uniform body color, lack of a dark tail band, and translucent flight feathers eliminates first-winter Lesser Black-backed Gull. | The original documentation form event lasted from 08:00:00/08:05:00. |
| Occurrence Status |
present |
| Field Number |
1987-28 |
| Event Remarks |
Viewing Conditions: Viewing conditions were excellent with the sun behind me most of the time. Estimated viewing distance was usually about 300-500 yards. I used a Buschnell 20-45x spotting scope and Nikon 8x23 binoculars. |
| Supporting Documentation |
|
| Date Digital |
30 May 2017 |
| File Type |
image/jpeg |
| Hardware / Software |
Epson - sheet feed |
