Some animals migrate from the moment that they’re born, and their first journey is almost always their most challenging. For female turtle hatchlings on Mexico’s Pacific coast, that means running a gauntlet of predators. They’ll spend 15 years at sea before returning to lay their own eggs on the very same beach. For the billions of baby red crablets of Christmas Island, it’s a chaotic journey past cannibal crabs and across manmade obstacles to get back to the forest. Young pumas must learn to hunt from their mothers before venturing out in search of their own territory, and elephant seal pups have to master the art of swimming before leaving the safety of the beach and striking out on their own. But for a few species, there’s an even bigger problem: what do you do when the environment your ancestors migrated through for millions of years has changed – and that change is putting your survival at risk?
