| UID |
|
| Digital Object Type |
Rare birds documentation form |
| Content DM Link |
https://n2t.net/ark:/87292/w9qv3c64r |
| Type |
Image, Text |
| Description |
Records Committee review for a Western Flycatcher at Lake Ahquabi State Park in Warren County, IA on November 14, 1992. Includes a record review document with votes, an article in American Birds, excerpts from Western Birds, articles in Pennsylvania birds, an article in Iowa Bird Life, correspondence relevant to bird sighting and review, eight photographs, and four documentation forms submitted to the committee. |
| Related Genres |
Administrative records Clippings (information artifacts) Correspondence Field notes Photographs |
| Sort Date |
1992-11-14 - 1999-10-15 |
| People / Organizations |
|
| Time |
11:00 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 |
12 |
| Folder |
35 |
| Contributing Institution |
Iowa State University Library Special Collections and University Archives |
| Creator / Author |
Johnson, Ann |
| Contributors |
Dinsmore, James J. Kent, Thomas H. (Thomas Hugh), 1934- Pyle, Peter, 1957- Blevins, Brian L. Herise, Don Schantz, Tim Zimmer, Kevin J. Iowa Ornithologists' Union Records Committee Fuller, James L |
| Topics |
Bird watching Ornithology Ornithology--Societies, etc |
| Birds |
Empidonax Flycatchers |
| Locations |
Lake Ahquabi State Park |
| Map |
|
| Verbatim Locality |
Lake Ahquabi State Park, Warren County, IOWA |
| Location Remarks |
The documentation forms do not include georeferences |
| Habitat |
Woodland edge consisting primarily of honeysuckle and junipers |
| Extent |
31 pages |
| Language(s) |
eng |
| Bibliographic Citation |
|
| Information Withheld |
|
| Individual Count |
1 |
| Occurrence Remarks |
The documentation form by Ann Johnson is the earliest and the one that forms the basis of this record. Other documentation forms by Thomas H. Kent, Jim Fuller, and Brian Blevins were submitted later. Other observers include Ross Silcock, Peter Petersen, Kelly McKay, Corey Blevins, Jim Scheib, Jim Sinclair, John Daniel, Tim Schantz, Cal Knight, Bernie Knight, Chuck Fuller, David Youngblut, Beth Brown, Sherry Dragula, Bill Overland, Jane Overland, John Miller, Eugene Armstrong, Eloise Armstrong, and unidentified other observers. | Elimination of similar species: The date of observation is historically good for a vagrant western flycatcher species, so this was in the back of my mind in assessing the characteristics observed. The presence of both eye ring and wing bars, in addition to size and shape, indicate that the bird fits the Empidonax complex. The combination of green back, yellow throat and pure orange lower mandible with no markings would eliminate Least, Hammond's, Dusky, Gray, Buff-breasted, Alder, and Willow Flycatchers. A juvenile Acadian can be eliminated by the short primary extension, color of the wings, size and shape of the eye ring, and active behavior. Only three species are indicated by the green upper parts and yellow under parts. Two are separable only by voice. The choices were between Yellow-bellied Flycatcher and Western (Cordilleran and Pacific-slope) Flycatcher. Back color is greener in Yellow-bellied and more olive in Western. Although the back looked olive, this was rather subjective. According to the Audubon Master Guide, behavior would be more indicative of a Yellow-bellied in that the bird was not flicking both tail and wings. According to Kaufman, however, behavior is quite variable. Three characteristics made me lean more toward Western complex. They were peaked appearance to the head (usually smooth and rounded in Yellow-bellied); almond-shaped eye ring (round, narrow, and more even in Yellow-bellied); and browner wings than eastern Empidonax. The color of the wings is again subjective, but the contrast between wing color and wing bars was less than the black/white (or even black/buff in fall birds) of eastern birds. Even with the variability that may occur in any Empidonax, it is unlikely that these three characteristics, which are common to the Western Flycatcher, would appear simultaneously in a Yellow-bellied Flycatcher. Further support is found in the Audubon Master Guide to Birding where it states in the description of Western Flycatcher, "...olive wash on the breast, flanks, and especially the sides tends to highlight a midventral yellow stripe" - one of the more obvious characteristics when viewed at close range from the front. IF the call notes heard belonged to this bird, it would indicate a Cordilleran Flycatacher, the most likely vagrant. None of us were able, however, to get the bird to call as we were observing it. Cal Knight played a tape and the bird became very agitated but did not call. | The original documentation form event lasted from 11:00:00/14:00:00 on November 14, 1992 and 11:30:00/13:45:00 on November 15, 1992. |
| Occurrence Status |
present |
| Field Number |
1992-38 |
| Event Remarks |
Viewing Conditions: The bird was observed at distances of 15 to 40 feet through 7X26 binoculars. Periodic sunshine was to our backs, but most of the time the sky was lightly overcast to partly cloudy. |
| Supporting Documentation |
Robbins CS, Bruun B, Zim HS. Birds of North America: a guide to field identification. New York: Golden Guides from St. Martin's Press. | National Geographic Society. National geographic field guide to the birds of North America. Washington D.C.: National Geographic Society. | Kaufmann K. Kaufman field guide to advanced birding. Peterson Field Guide Series. New York: Houghton Mifflin Harcourt. | Peterson RT. A field guide to Western Birds. Boston, MA: Houghton Mifflin Company. | Farrand J. Audubon society master guide to birding. New York: Alfred A. Knopf. | Zimmer K. The Western bird watcher: an introduction to birding in the American West. Upper Saddle, NJ: Prentice-Hall. | Pyle P, Howell S, & Yunick R. Identification guide to North American passerines: a compendium of information on identifying, aging, and sexing passerines in the hand. Point Reyes, CA: Slate Creek Press. | Ehrlich PR, Dobkin DS, Wheye D. The Birder's handbook: a field guide to the natural history of North American birds. New York: Simon & Shuster. |
| Date Digital |
07 Jun 2017 |
| File Type |
image/jpeg |
| Hardware / Software |
Epson - sheet feed/flatbed |
