This 2016 sheetlet from Canada shows a rock ptarmigan (Lagopus muta), a great horned owl (Bubo virginianus), a northern raven (Corvus corax), an Atlantic puffin (Fratercula arctica) and a sharp-tailed grouse (Tympanuchus phasianellus).

The first one, an arctic game bird , changes colour from winter (white) to summer (brown). Here is depicted in its winter plumage.

The great horned owl is native to America. It hunts rabbits, skunks and various species of rodents, birds, reptiles etc. Due to its wide distribution, it has a number of sub-species.

The northern or common raven is the most widely distributed corvid and it is also has a big number of sub-species. It is an omnivorous bird.

The atlantic or common puffin, native to the Atlantic ocean, lives in colonies. It feeds on small fish, crabs and zooplankton. The IUCN lists the species as vulnerable.

Finally, the sharp-tailed grouse, another game bird, is distributed in Canada and in parts of the USA. It has seven sub-species, one of which is extinct. It feeds on seeds, insects, leaves, berries etc.