Documentation of Orange-crowned Warbler

Observer Information

Reporter:  Steven Mlodinow  530 Peregrine Circle,   Longmont, CO  80504-8806
Other Observers:  none;

Species, Date, Time and Location Information

Species:  Orange-crowned Warbler
First Date/Time:  9/17/2011
Last Date/Time: 
Duration (total time in view):  2-3 minutes
County:  Washington
Specific Location:  Prewitt Reservoir, below dam
Number:  1
Age:  Unknown
Sex:  Unknown
Plumage:  Other/Unknown

Description of the Bird

Orange-crowned Warbler dramatically different from others seen that day and during two weeks prior. Strongly reminiscent of those commonly seen in w. Washington. Bright yellow beneath, not as saturated as in Wilson's Warbler, with yellow marginally more intense on undertail coverts. There were a few poorly defined dusky greenish smudges on sides of upper chest. Supercilium yellow, more pronounced in front of eye rather than behind. Broken eyering yellow above and below. Upperparts moderately bright green, but washed with faint gray on nape and upper back. No gray wash on head (unless one includes nape as part of head). Wing coverts green, similar to back. Rump slightly brighter. No wingbars, though narrow whitish tips to folded tertials and primaries noted.
Behaviors: Moved about low in Russian Olives, having come in to pishing
Call: not heard
Plumage: fresh fall

Similar Species Discussion

The brightness of this bird's plumage, without gray wash to head, should eliminate orestera and celata. Per Dunn and Garrett, fall lutescens do/can have some grayish wash to upperparts, which this bird had, but not extensively. In fall, at least, I have found a yellow eyering to be, apparently, indicative of Lutescent Warbler as well. This bird was dramatically different than others seen this fall, which is what brought me to submit it. I am not certain that I can ID this subspecies in spring, and indeed, it is possible that they are not identifiable at any season in the field. However, as much as such is possible, I feel that this bird is/was of the west coast race, lutescens.

Resources Used

Garrett and Dunn to confirm that lutescens can have some gray wash on upperparts in fall

Previous Experience



Notes made AFTER observation

Additional Information

Comments: Notes taken immediately after bird departed.
Time: 1:00 pm
Other Dates:
Nearest Town: Merino
Independent Observers:

Materials Available

No files uploaded.

Date Documentation Submitted

9/18/2011 5:03:00 PM