The raptors guarding Mexico City's airport

Far from the crowds of passengers, lines and passport control, Madison spreads his wings on the side of a runway at Mexico City's international airport, the busiest in Latin America.

Sex in the city: Peregrine falcons in Chicago don't cheat

Peregrine Falcons, in their normal habitat on isolated cliffs, mate for life. But some 25 pairs now nest on Chicago skyscrapers and bridges, and city living has them in much closer quarters than they used before humans dominated ...

Satellite tracking reveals where the wild peregrines go

We know very little about the time between when birds leave their natal territories and when they settle on their winter grounds. Although the period is a black hole of information, it is believed to be a critical time for ...

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