Bird Fact Friday – Weekly Warbler: Black-throated Blue

From page 192-193 in The Warbler Guide:

Black-throated Blue Warbler, Fall Female, credit Scott Whittle

The female Black-throated Blue Warbler’s blue-green back and buffy undersides create a relatively low-contrast appearance. Its darker cheek creates a faint mask. Though from some angle, the mask can be very prominent. A small white “handkerchief” mark is created by white coloration at the base of the outer primaries. The Black-throated Blue Warbler is an active, understory forager, often seen near eye level. It frequently makes a loud, dry, “kissy” chip call while foraging in the fall. The Black-throated Blue Warbler is a good example of sexual dimorphism: the male and female are very different in color, although their body structure is the same.



The Warbler Guide
Tom Stephenson & Scott Whittle
Drawings by Catherine Hamilton
Warbler Guide App
Species Account Example: American Redstart Male

Warblers are amwarblerong the most challenging birds to identify. They exhibit an array of seasonal plumages and have distinctive yet oft-confused calls and songs. The Warbler Guide enables you to quickly identify any of the 56 species of warblers in the United States and Canada. This groundbreaking guide features more than 1,000 stunning color photos, extensive species accounts with multiple viewing angles, and an entirely new system of vocalization analysis that helps you distinguish songs and calls.

The Warbler Guide revolutionizes birdwatching, making warbler identification easier than ever before. For more information, please see the author videos on the Princeton University Press website.

This post is part of a series, explore additional posts here<< Bird Fact Friday – Weekly Warbler: BlackpollBird Fact Friday – How do long-winged harriers hunt prey? >>