In Minnesota, a boreal forest ecosystem could shift north over the Canada border this century. Local photographers, scientists, and land managers are grappling with what that means—and how to respond.

Vast numbers of the swallows pass through one roost in the heart of the Amazon before winging their way to North American birdhouses. Studying it could provide clues to the species’ decades-long decline.

A new state-wide program recruits volunteers to survey breeding birds that would otherwise go uncounted.