doomer

But for those in the tropics, the findings were sobering: extreme heat had slashed tropical bird populations by 25% to 38% over the past 70 years. Tropical songbirds, they found, were hit hardest.

The losses in the tropics have been so profound, in part, because species there are already living near their limit of heat tolerance, Kotz says. At the same time, birds in tropical regions are experiencing dangerously hot days about 10 times more often than they did in the past.