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Martha McDermott; I am the original observer of this bird.
Species, Date, Time and Location Information
Duration (total time in view):
Along Brainard Lake Road just west of Red Rock Lake. GPS coordinates 40 degrees 4 minutes 57.87 seconds N, 105 degrees 32 minutes 36.21 seconds W
Thickly vegetated, marshy willows with running water.
Nikon Action 8 x 40 and Nikon Monarch 8x42
About 5 ft at the closest
The sky was completely overcast, light conditions did not impact the identification of this species.
Description of the Bird
Size larger than a Wilson's Warbler, white supercilium, white lower eye arc with an otherwise black face. Yellow throat, black necklace, yellow belly and flanks with thick black longitudinal stripes. Thick white wing bar and a yellow rump.
Behaviors: Feeding on buds in a willow thicket.
Call: soft call notes
Similar Species Discussion
The birds prominent yellow rump and dark back eliminated all species of warbler except Yellow-rumped Warbler and alternate plumage male Cape May Warbler. The Myrtle form of the Yellow-rumped Warbler was eliminated due to the presence of a yellow throat. Audubon's form of the Yellow-rumped Warbler was eliminated as a possibility due to the presence of the thick white supercilium, an entirely yellow belly and the thick black longitudinal stripes along the belly and flanks. The lack of rufous on the face and the completely yellow belly and flanks rule out alternate plumage male Cape May Warbler
The Sibley Guide to Birds was used after the sighting to aid in identification.
This is my life Magnolia Warbler, my co-observer is quite familiar with Magnolia Warbler and lives in it's breeding range. Both of us are quite familiar with the Audubon's form of the Yellow-rumped Warbler.
Notes made AFTER observation
Date Documentation Submitted
6/4/2007 12:12:00 AM
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