| UID |
|
| Digital Object Type |
Rare birds documentation form |
| Content DM Link |
https://n2t.net/ark:/87292/w9t727j6w |
| Type |
Text |
| Description |
Records Committee review for a Thayer's Gull at Saylorville Dam in Polk County, IA on December 10, 1981 recorded incorrectly as 1982 on the documentation form. Includes a record review document with votes, correspondence and commentary about the sighting, and a documentation form submitted to the committee. |
| Related Genres |
Administrative records Correspondence Field notes |
| Sort Date |
1981-12-10 - 1993-08-26 |
| People / Organizations |
|
| Time |
|
| 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 |
Schaufenbuel, Joseph P. |
| Contributors |
Kent, Thomas H. (Thomas Hugh), 1934- Paulson, Dennis R. Dunn, Jonathan L. Lehman, Paul Newlon, Michael C. Wahl, Terrence R. Iowa Ornithologists' Union Records Committee |
| Topics |
Bird watching Ornithology Ornithology--Societies, etc |
| Birds |
Thayer's Gull |
| Locations |
Saylorville Dam |
| Map |
|
| Verbatim Locality |
Above and below Saylorville Dam |
| Location Remarks |
The documentation forms do not include georeferences |
| Habitat |
Open water, rocky shore and ice covered pond. |
| Extent |
9 pages |
| Language(s) |
eng |
| Bibliographic Citation |
|
| Information Withheld |
|
| Individual Count |
1 |
| Occurrence Remarks |
The documentation form by Joe Schaufenbuel is the only one submitted and forms the basis of this record. | Elimination of similar species: [...] Nearly the same size as an immature Herring Gull, but neck seemed thinner, head smaller. Bill was same length as a Herring Gull's but was blunter, not as strongly hooked. [...] The primaries were not nearly as dark as immature (1st year) or 2nd year Herring Gulls and was of a much different color than the black color of that species. Primaries and tail were nearly the same color. [...] In flight this bird could be easily picked out from the immature Herring Gulls at considerable distances. Using 7x35 binoculars the beige color of the upper surface of wings and translucent underwing could be detected as far as three-quarters of a mile. There were also three other birds that resembled this particular bird though they appeared darker on the upperparts. However I was unable to get close observations of these birds. The bird I observed closely and documented had one primary feather missing and aided in tracking the bird from day to day. |
| Occurrence Status |
present |
| Field Number |
1981-19 |
| Event Remarks |
Viewing Conditions: The bird was seen over the course of several days in many light conditions and angles. It was seen within 75 yards for 1/2 hour and as close as 50 yards. |
| Supporting Documentation |
Taverner PA. Birds of Canada. Ottawa (CA): National Museum of Canada. | Lehman, P. Identification of Thayer's gulls. Birding. 1980;12(6);198-210. | Grant, PJ. Gulls: a guide to identification. Cambridge, MA: Academic Press. |
| Date Digital |
30 May 2017 |
| File Type |
image/jpeg |
| Hardware / Software |
Epson - sheet feed |
