Poecile atricapillus, also known as the Black-capped Chickadee, is a small passerine bird found in North America, including Canada and the United States.

The Black-capped Chickadee has a distinctive plumage, with a black cap and bib on its head, and white cheeks. Its back is a soft grey-brown, and its underparts are a pale beige color. It has a short, thick bill, which it uses to crack open seeds and nuts.

The Black-capped Chickadee is known for its cheerful and distinctive song, which is a clear and whistled “chick-a-dee-dee-dee” call. It feeds mainly on insects, seeds, and berries, and is known for its ability to store food for the winter.

Although the Black-capped Chickadee is not considered to be threatened, its population is declining in some areas due to habitat loss and fragmentation. Its conservation status is currently listed as “Least Concern” by the International Union for Conservation of Nature (IUCN).