Black-capped Chickadee is a medium-sized, stocky chickadee with pale gray upperparts and breast and pale olive-brown underparts. The black cap and bib and white cheeks are conspicuous. Its black bill is short and thin. Wings are dark with broad white edges on feathers. The Back-capped Chickadee is the state bird of Maine and Massachusetts.
Chickadees may be found in any habitat that has trees or woody shrubs, from forests and woodlots to residential neighborhoods and parks, and sometimes weedy fields and cattail marshes. They frequently nest in birch or alder trees.
Black-capped Chickadees seldom remain at feeders except to grab a seed to eat elsewhere. They are acrobatic and associate in flocks—the sudden activity when a flock arrives is distinctive. They often fly across roads and open areas one at a time with a bouncy flight.
Bring your own pen. You are looking for a test tube shaped cache.