Pygmy Nuthatch - nest-building

A Pygmy Nuthatch, Sitta pygmaea, enlarging a hole in a stump of Ponderosa Pine. 

Pygmy Nuthatches are very acrobatic and can be seen climbing the trunks and branches of trees in search of insects and seeds.

Pygmy Nuthatches are very acrobatic and can be seen climbing the trunks and branches of trees in search of insects and seeds.

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Alternating digging out the hole like a woodpecker and bringing the chips out and releasing them with a vigorous head shake.

Alternating digging out the hole like a woodpecker and bringing the chips out and releasing them with a vigorous head shake.