| UID |
|
| Digital Object Type |
Rare birds documentation form |
| Content DM Link |
https://n2t.net/ark:/87292/w9rr1pn97 |
| Type |
Text |
| Description |
Rare bird documentation form for a Red-necked Grebe at Dale Maffit Reservoir in Dallas County, IA on March 11, 1990. |
| Related Genres |
Field notes |
| Sort Date |
1990-03-11 |
| People / Organizations |
|
| Time |
4:34 PM |
| Rights |
This Item is protected by copyright and/or related rights. However, for this Item, 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 |
32 |
| Folder |
13 |
| Contributing Institution |
Iowa State University Library Special Collections and University Archives |
| Creator / Author |
Johnson, Ann |
| Contributors |
|
| Topics |
Birds--Identification Ornithology Rare birds |
| Birds |
Red-necked Grebe |
| Locations |
Dale Maffitt Reservoir |
| Map |
|
| Verbatim Locality |
Dale Maffitt Reservoir, Dallas Co., IA |
| Location Remarks |
The documentation forms do not include georeferences |
| Habitat |
Open water on man-made reservoir; near weedy shoreline |
| Extent |
2 pages |
| Language(s) |
eng |
| Bibliographic Citation |
|
| Information Withheld |
|
| Individual Count |
1 |
| Occurrence Remarks |
The documentation form by Ann Johnson is the only one submitted and forms the basis of this record. | Elimination of similar species: Loon were eliminated because, although the neck was somewhat thick, it was longer than a loon. The head was also a bit flatter and it rode higher in the water, just giving a different posture than a loon. Plumage details did not fit any loon. Western Grebe- Thicker neck, some color on neck and white cheek eliminated this one Pied-billed Grebe - Size, bill shape, and other features wrong. Horned/Eared Grebes - Although it gave much the same appearance as a horned grebe, size and bill eliminated both. | The original documentation form event lasted from 16:34:00/16:42:00. |
| Occurrence Status |
present |
| Field Number |
|
| Event Remarks |
Viewing Conditions: The bird was observed through a scope at an estimated 1/4 - 1/3 mile (judged from county map) at 30-40x. The sky was overcast and in fact light rain began as I was searching for the bird on the west side of the park. The sky did not present any problem at lower powers, but when I zoomed to 40x to try to make out coloration better, the lack of light was more problematic. |
| 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. | Peterson, RT. Peterson field guide to birds of North America. New York: Houghton Mifflin Harcourt. | Farrand J. Audubon society master guide to birding. New York: Alfred A. Knopf. | Robbins CS, Bruun B, Zim HS. Birds of North America: a guide to field identification. New York: Golden Guides from St. Martin's Press. |
| Date Digital |
17 Nov 2017 |
| File Type |
image/jpeg |
| Hardware / Software |
Epson - sheet feed |
