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Montana Field Guide

Montana Field Guides

Black-throated Blue Warbler - Setophaga caerulescens


Global Rank: G5
State Rank: SNA

Agency Status
USFWS: MBTA
USFS:
BLM:
PIF:


 

External Links





 
General Description
Species sexually dimorphic. Males have dark blue back, while their flanks, face, and throat are black; the lower part of underparts white. Females greenish-gray in color with a distinguishable white wing spot; also white stripe under wing.

For a comprehensive review of the conservation status, habitat use, and ecology of this and other Montana bird species, please see Marks et al. 2016, Birds of Montana.

Species Range
Rare Migrant

Western Hemisphere Range

 


Summary of Observations Submitted for Montana
Number of Observations: 25

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density

Recency

Breeding
(direct evidence "B")


Breeding
(indirect evidence "b")


No evidence of Breeding
(transient "t")


Overwintering
(regular observations "W")


Overwintering
(at least one obs. "w")



 

(Observations spanning multiple months or years are excluded from time charts)



Habitat
During migration, species prefers forest edges, riparian woodlands, and other well-vegetated habitats, including parks and gardens. Species breeds in undisturbed deciduous/coniferous forests.

Food Habits
Diet consists of mostly insects; during winter, feeds on berries and fruit.

Reproductive Characteristics
One, two, or occassionally three broods per season; 4 eggs per brood. Incubation period 12 to 13 days. Nests usually built in shrubs or small trees.

References
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Citation for data on this website:
Black-throated Blue Warbler — Setophaga caerulescens.  Montana Field Guide.  .  Retrieved on , from