Known for their agility, strength, and love for flying, switching to auto-pilot when they need sleep during their long flights

These widespread birds love to socialize, travel in groups, prefer to stay in the air, and live a long life (until caught by a predator). They spend most of their lives flying and catching food while gliding through the air.

They mostly land only during the breeding season to nest. Did you know that birds in this genus can roost and nest in vertical spots like chimneys? And no, they are not related to spiders. This unique behavior is facilitated by a distinct morphological feature called lateral grasping foot; in this arrangement, the last two toes oppose the first two. It allows them to inhabit places out of reach for other birds.