These animals fly some 3,725 miles round-trip ... Each couple defends a territory of about three-fourths square miles. The bird's tundra nests are large stick dwellings lined with moss and grasses.

Common and hoary redpolls are 2 closely related finches of the boreal forest and Arctic tundra scrub. The common is the more widespread species of ... when they form large flocks.

HABITAT: Arctic foxes live in Arctic and alpine tundra, in coastal areas ... returning in late winter or early spring. Large-scale migrations have been recorded in Canada, Russia, and the Scandinavian ...