Yet another impact of climate change

Decades ago, we banned the use of DDT as a pesticide, and freed from the substance’s ability to thin shells, many raptor species’ populations rebounded. Now we have a new problem. Newly healthy populations of Peregrine Falcons are now expanding their range as upper latitudes warm. And we are learning that the cold-adapted Gyrfalcons have nowhere to go and can’t compete with the faster Peregrines.

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