Verification of Unusual Sight Record
For Utah

Rec. # 2015-16

Common name:

Mourning Warbler

Scientific name: Geothlypis philadelphia
Date: May 20, 2015
Length of time observed: about one minute
Number: 1
Age: male
Location: Skipper Bay Trail
County: Utah
Distance to bird: 20-25 feet
Optical equipment: Binoculars 8.5x42
Weather: Clear, sunny
Light Conditions: Very good; sun behind me while looking at the bird and not behind the bird.
Description:        Size of bird: Warbler
(Description:)       Basic Shape: Warbler
(Description:)  Overall Pattern: Yellow undersides and dark head/breast
(Description:)            Bill Type: Warbler-like
Field Marks and
Identifying Characteristics:
All the looks of a MacGillivray's Warbler except it had NO bold white eye-arcs or eye-ring of any kind.

Very dark face/head/hood with the dark color extending onto throat/bib and breast; bright yellow on belly, undersides, and under the tail.
Song or call & method of delivery:  
Behavior: Kept low, never higher than 4-5 feet off ground
Habitat: Low thick vegetation
Similar species and how
were they eliminated:
Same size and looks of a MacGillivray's Warbler which has bold white eye-arcs. The bird seen was identical to a MacGillivray's except it had NO bold white eye-arcs.
Previous experience with
this & similar species:
Previously seen at Pt. Pelee, Canada and Duluth, Minnesota areas.
References consulted: The following field guides: Sibley Guide, 2E, page 479; National Geo, 6E; Stokes
Description from: Notes taken at the time of the sighting
Observer: Alton Thygerson
Observer's address: 3300 Mohican Lane; Provo, Utah
Observer's e-mail address: **
Other observers who independently identified this bird: none
Date prepared: May 24, 2015
Additional material:  
Additional_Comments: It perfectly matches the Sibley, 2nd edition, page 479's illustration.