boreal chickadee (Poecile hudsonicus), black-capped chickadee (Poecile atricapillus), downy woodpecker (Dryobates pubescens), white-breasted nuthatch (Sitta carolinensis)
A habitat group diorama at the Zoological Museum (now Bell Museum) of the University of Minnesota, showing Boreal (Hudsonian) and Black-capped Chickadees, a Downy Woodpecker, and a White-breasted Nuthatch
Source 1921 Minneapolis Audubon Society calendar, in Special Collections at Minneapolis Central Library
Author Jenness Richardson
The boreal chickadee (Poecile hudsonicus) is a small passerine bird in the tit family Paridae. It is found in the boreal forests of Canada and the northern United States.
The black-capped chickadee (Poecile atricapillus) is a small, nonmigratory, North American songbird that lives in deciduous and mixed forests. It is a passerine bird in the tit family Paridae.
The downy woodpecker (Dryobates pubescens syn. Picoides pubescens) is a species of woodpecker in North America. Adult downy woodpeckers are the smallest of North American woodpeckers.
The white-breasted nuthatch (Sitta carolinensis) is a small songbird of the nuthatch family which breeds in old-growth woodland across much of temperate North America. It is a stocky bird, with a large head, short tail, powerful bill, and strong feet.