PO BOX 362,
None; David Silverman
Species, Date, Time and Location Information
Duration (total time in view):
SW corner Zorn Rd. & Boulder Ave.
Weedy wood lot bordered by dense stands of scrub oak, crabapple and narrowleaf cottonwoods.
10x40 Zeiss binocular
100 feet estimated
Good-clear skies, bird was SW of observer
Description of the Bird
A chunky pot-bellied warbler with short squarish tail, this bird was similar in size to nearby Macgillivray's Warbler
This bird had no streaks, mottling, nor wing bars, except for bold thick blackish crown stripes and narrower post ocular stripe, with much paler light beige stripes between dark crown stripes.
Upperparts were uniform pale greenish olive. Underparts were light beige melding to a brighter buff on the breast.
Bill was narrow, sharply tipped but fairly long for a warbler, and dark colored. Legs were flesh colored, but I did not see feet well. Eye was dark with no noticeably prominent eyering.
Behaviors: Bird foraged near bottom of narrowleaf cottonwood among small bunches of dead leaves.
Similar Species Discussion
Larger Swainson's Warbler is similar in shape to Worm-eating Warbler(WeWa) but has rufous unstriped crown and browner, not greenish olive, upperparts. Swainson's also has plain off-white breast lacking warm buff of WeWa.
Chunky oporornis warblers have mostly yellow underparts and lack crown stripes. WeWa does not show noticeable yellow colors.
Black & White Warbler has striped crown but heavily mottled upperparts, wingbars, and streaked underparts. WeWa shows no prominent mottling, wingbars, nor streaks.
Sibley GUIDE TO BIRDS(2000)
I've seen Swainson's Warblers twice, a few CT Warblers, and many other oporornis and Black&White Warblers.
Notes made AFTER observation
No files uploaded.
Date Documentation Submitted
8/26/2010 10:50:00 AM