When we see a bird, do we actually notice it? Many of us don't. But in Britain, there are more than a million members of the RSPB and, thanks to social media, there is also a growing number of bird photographers. From the giant raptors of our skies t...

This pioneering work investigates why endothermy, or "warm-bloodedness", evolved in birds and mammals, despite its enormous energetic costs. Arguing that single-cause hypotheses to explain the origins of endothermy have stalled research since the 197...

In this "personal encyclopedia of nature's seasons", lifetime naturalist Bruce Beehler reflects on his three decades of encountering nature in Washington, D.C. The author takes the reader on a year?long journey through the seasons as he describes the...

People form enduring emotional bonds with other animal species, such as dogs, cats, and horses. For the most part, these are domesticated animals, with one notable exception: Many people form close and supportive relationships with parrots, even thou...