Verification of Unusual Sight Record
For Utah

Rec. # 2009-10

Common name:

Chestnut-sided Warbler

Scientific name: Dendroica pensylvanica
Date: 22 May 2009
Time: about 10:30 AM
Length of time observed: about 5 minutes
Number: 1
Age: adult
Sex: non-breeding male
Location: Calf Creek Recreation Area near the parking lot
County: Garfield
Distance to bird: about 12 feet
Optical equipment: 8 x 42 binoculars
Weather: cloudy and wet
Light Conditions: overcast, but light
Description:        Size of bird: small in comparison to a near-by Spotted Towhee
(Description:)       Basic Shape: warbler
(Description:)  Overall Pattern: olive green on top, white underneath
(Description:)            Bill Type: warbler
Field Marks and
Identifying Characteristics:
The top of the head was light olive green which extended down the back.  The sides of the head were gray and there was an obvious complete white eye-ring.  The underside was white from the throat to the vent and undertail coverts.  There was a dark rusty brown stripe of a fairly uniform width extending along the side of the breast and belly, which was completely surrounded by white.  There was one secondary or possibly tertial wing feather that was light yellow-green which stood out from the other more dark gray-green wing feathers.
Song or call & method of delivery: none was heard
Behavior: It flew into the lower branches of a small bush and worked its way up to the upper branches probing as it went.
Habitat: This was in a riparian area but a little ways away from the stream.  The area is surrounded by pinyon-juniper habitat and red-rock cliffs.
Similar species and how
were they eliminated:
The only other warbler or vireo type of bird that would have rusty-brown color on its sides would be a Bay-breasted Warbler, which would probably have some yellowish color on the underside, wouldn't have a complete eye-ring would have more color in the face instead of light gray and would be more brownish on the top of the head and mantle rather than light olive green.
Previous experience with
this & similar species:
I have seen Chestnut-sided Warblers several time in Ohio and Kentucky.
References consulted: Sibley's, National Geographic field guide, Peterson's Field Guide to Warblers of N.A.
Description from: Memory
Observer: Milton Moody
Observer's address: 2795 Indian Hills Dr., Provo Utah 84604
Observer's e-mail address:
Other observers who independently identified this bird: Minna and Jon Larkin
Date prepared: 27 May 2009
Additional material: