Breeding and the greening of the landscape are tied to another major spectacle of spring: the mass movements of animals as they take advantage of spring’s bounty. Meet the scientists who track the journeys of animals such as butterflies, birds, bison and bats over vast distances, from winter refuge to spring nesting grounds.
American Spring LIVE continues with a second night of real-time adventures.
From hibernation to mass migrations, the natural world is on the move.
And with our cameras rolling, you won't miss a moment!
'When you catch a 16-year-old bird, they've flown enough miles to have gone to the moon.'
Spring is happening now, live on PBS.