The last state to pick its bird was Arizona in 1973. So, grab your bird-watching binoculars and get to know the 50 official state birds in the U.S., from Alabama to Wyoming (and Washington, D.C., too) ...

Discover how mountain chickadees use complex calls to communicate food sources, social interactions, and predator presence.

Black-capped chickadees are their close relatives. The two birds look very similar, except that mountain chickadees have a pair of white eyebrow-like stripes above their eyes.

Chickadees may be portrayed as radiating tranquil beauty on holiday cards, but realistically, these loud, round ruffians are tough survivors of harsh winter environments in northern latitudes.

Migratory birds like warblers will often seek out the company of chickadees while on their journeys south for the winter. For these feathered travelers, chickadees are a bit like helpful guides ...

A black-capped chickadee stores sunflower seeds in an artificial arena made of 128 different perches and pockets. These birds excel at finding their hidden food stashes.