| UID |
|
| Digital Object Type |
Rare birds documentation form |
| Content DM Link |
https://n2t.net/ark:/87292/w9sb3x082 |
| Type |
Text |
| Description |
Rare bird documentation form for a Red-necked Grebe at Mehaffey Bridge area at the Coralville Reservoir in Johnson County, IA on November 19, 1986. |
| Related Genres |
Field notes Forms (documents) |
| Sort Date |
1986-11-19 - 1989-11-30 |
| People / Organizations |
|
| Time |
7:45 AM |
| 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 |
Hollis, Richard Jule |
| Contributors |
|
| Topics |
Birds--Identification Ornithology Rare birds |
| Birds |
Red-necked Grebe |
| Locations |
Mehaffey Bridge |
| Map |
|
| Verbatim Locality |
Coralville Reservoir - Mehaffey Br. Area - Johnson Co. |
| Location Remarks |
The documentation forms do not include georeferences |
| Habitat |
lake |
| Extent |
2 pages |
| Language(s) |
eng |
| Bibliographic Citation |
|
| Information Withheld |
|
| Individual Count |
1 |
| Occurrence Remarks |
The documentation form by Richard Hollis is the only one submitted and forms the basis of this record. Other observers include Jim Fuller and Carol Thompson. | Elimination of similar species: After ruling out Horned & Eared Grebes due to bill size & color & shape the only possibilities for this bird are Western Grebe and smaller loons. 1. Red-throated loon seems ruled out by shape of bill. 2. In fact all loons & W. Grebe seem ruled out by bicolored bill. 3. Posture & Build were slimmer than most loons I've seen. 4. Neck which definitely was grey (in past) all the way around in front also seems to rule out there. I am puzzled by 2 things & although I'm sure it is a RN Grebe I wonder if it is in some intermediate plummage [sic]. 1 White patch at waterline in front. I saw this distinctly & sketched it on 11/9 as well as on a brief look at the bird on 11/16. 2 Dark cap seems to extend farther down the head than any of the plates would lead me to expect. | The original documentation form event lasted from 07:45:00/08:15:00. |
| Occurrence Status |
present |
| Field Number |
|
| Event Remarks |
Viewing Conditions: ? -it was 2/3 of the way from bridge to the far shore Optical equipment: Spotting Scope Light: Light overcast. |
| Supporting Documentation |
Harrison P. Seabirds: an identification guide. New York: Houghton Mifflin Harcourt. |
| Date Digital |
17 Nov 2017 |
| File Type |
image/jpeg |
| Hardware / Software |
Epson - sheet feed |
