Verification of Unusual Sight Record
For Utah

Rec. # 2021-68

Common name:

Black-throated Blue Warbler

Scientific name: Setophaga caerulescens
Date: 11/9/2021
Time: 9:00am
Length of time observed: 5 minutes
Number: 1
Age: Hatch Year
Sex: Male
Location: Logan
County: Cache
Latilong: 41.752335, -111.790156
Elevation: 4,900ft
Distance to bird: 8m
Optical equipment: Nikon10x42 Binoculars
Weather: Overcast, cold(38F),calm
Light Conditions:  
Description:        Size of bird: small passerine
(Description:)       Basic Shape: typical warbler
(Description:)  Overall Pattern: blue back, white belly
(Description:)            Bill Type: insectivore
Field Marks and
Identifying Characteristics:
Initially reported by Brady Miller on 11/7/21, bird re-found and photographed by Matt Brady, Mike Taylor and Cullen Clark 11/8/21 so I gave chase. Short tailed but chunky warbler, entirely blue on the crown, back and upperside of wings and tail with a black cheek and throat and contrasting white belly with black streaking on flanks, white spot on base of outer primaries, and white corners on outer tail feathers seen in flight. Broad, flat, black bill. Some whitish speckling in the throat and greenish coloring on the back indicates this is likely a hatch year male.
(see photos)
Song or call & method of delivery: Heard a distinctive flat chip, much like a Juncos
Behavior: Feeding on grapes in a trellis, the hiding into evergreen shrubs(Viburnums)
Habitat: Residential neighborhood with cultivated plants, but along a tiny canal next to a park, open foothills just 100m to the east.
Similar species and how
were they eliminated:
Males are pretty distinctive with nothing quite similar. Cerulean Warbler only other blue warbler in North America but they have a white throat, 2 white wingbars and more of a streaked black and blue. Lazuli Bunting has an orange breast and 2 wingbars.
Previous experience with
this & similar species:
My 1st male, I saw a female last year
References consulted: eBird
Description from: From photo(s) taken at the time of the sighting
Observer: Bryant Olsen
Observer's address: 84102
Observer's e-mail address: **
Other observers who independently identified this bird: Initially found by Brady Miller, many since
Date prepared: 11/13/21
Additional material: Photos
Additional comments: eBird checklist: