有些动物偏爱高温

We have long expected animals to move to cooler habitats as climate change bites, but it now appears that many are actually doing the opposite, finds Aisling Irwin CLIMATE change was meant to mean big trouble for Bicknell’s thrush. One of North America’s rarest songbirds, the species was already struggling with mercury poisoning and habitat loss. As the bird’s mountainous home warmed, ecologists worried that a new threat would move in: the American red squirrel, a mammal that will supplement its seed-rich diet with songbird eggs and nestlings. The squirrels are found downhill of the thrushes and were expected to move up the mountainside as temperatures rose. But that didn’t happen. …