On Mount Karimui, an extinct volcano on the main island, the range of the magnificent bird-of-paradise had ascended more than three hundred feet as a result of warming of just 0.7 degree Fahrenheit. “Because a mountain is like a pyramid,” says Freeman, “there’s less area for habitat available as they move up the mountain. They’re being squeezed both by temperatures and for space.” The white-winged robin, for instance, which lived on the top one thousand feet of a mountain fifty years ago, now wedges into just the top four hundred feet.
