Verdin, Joshua Tree National Park

Eurasian Blue Tit, Oulu Finland

Chestnut-backed Chickadee

Verdin, Joshua Tree National Park

Cobb's Wren, Carcass Island, Falklands

Eurasian Blue Tit and Great Spotted Woodpecker, Oulu Finland

Bewick's Wren

Mountain Chickadee

Wrentit, Montana de Oro Park California

Cactus Wren, Joshua Tree National Park

Oak Titmouse, Eastman Lake California

Eurasian Blue Tit, Oulu Finland

Cactus Wren, Joshua Tree National Park

Black-capped Chickadee

Canyon Wren, Eastman Lake California

Bewick's Wren

Marsh Wren

Bushtit

Black-capped Chickadee

Great Tit, Oulu Finland

Marsh Wren

Gray-headed Chickadee, Ivalo Finland

Mountain Chickadee

Great Tit, Oulu Finland