What to know about the hard-to-track blackpoll warbler, nicknamed 'nature's hearing test', just in time for its arrival in ...

The blackpoll warbler songbird can fly as far from Alaska to the Amazon. Exactly how birds know where and when to migrate, especially those that have never made the flight before, is still ...

Known for their speed and precision, barn swallows scoop up mosquitoes mid-air during flight. Image: X/ @JocAPhotography ...

The blackpoll warbler songbird can fly as far from Alaska to the Amazon. Exactly how birds know where and when to migrate, especially those that have never made the flight before, is still ...

The blackpoll warbler songbird can fly as far from Alaska to the Amazon. Exactly how birds know where and when to migrate, especially those that have never made the flight before, is still ...

Some birds, like blackpoll warblers, take a different route in fall than they do in spring. No matter the route, it's determined by where the bird's ancestors have gone in the past. It's surely ...

Some examples of common birds now in decline include the chimney swift, wood thrush, grasshopper sparrow, eastern meadowlark, common grackle, barn swallow, blackpoll warbler, herring gull and ...

The blackpoll warbler songbird can fly as far as from Alaska to the Amazon. Exactly how birds know where and when to migrate, especially those that have never made the flight before, is still ...