Swift bird in flight with a colorful sky in background. Black swallow. Image with copy space.© Marco Lissoni/Shutterstock.com Of all the marvels of the natural world, few are as astonishing as the ...

Add Yahoo as a preferred source to see more of our stories on Google. Swift bird in flight with a colorful sky in background. Black swallow. Image with copy space.© Marco Lissoni/Shutterstock.com The ...

Of all the marvels of the natural world, few are as astonishing as the common swift (Apus apus). These small birds spend nearly their entire lives in flight, engaging in activities such as eating, ...

The physiology of Apus apus is highly specialized, enabling essential functions, such as feeding, drinking, resting, and even mating, to occur almost entirely while airborne Remaining airborne for up ...