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The fastest living creature on Earth, the peregrine falcon can reach speeds of up to 200 mph (320 km/h) when it dives to capture prey—typically other birds that it seizes in midair. Small bony tubercles on its nostrils guide the high-pressure airflow away from its lungs during a dive, while transparent inner eyelids protect its eyes. It usually nests on cliff ledges, but in urban areas skyscrapers serve as an adequate substitute. What is the primary food source of a city-living peregrine falcon? Discuss
Source: The Free Dictionary