New York's mandarin duck might be the most beautiful in the world, but Australia’s black goth duck has no interest in subscribing to mallard beauty standards. A rare tufted duck, with dark, ...

1. The doubly labelled water (DLW) technique has been used to estimate the rate of energy expenditure of many species of free-living birds including some that dive. The technique, however, has never ...

I heard that a Tufted Duck is being seen on Long Pond in Harwich. I would like to see this rare species, but Long Pond is pretty big and I’m not sure where to look. Any suggestions? –Chris, Sandwich, ...

Recent bird sightings reported to Mass Audubon: Highlights last week included single tufted ducks in Nantucket and Brewster, single eared grebes in Nantucket and Marblehead, a Pacific loon at Race ...

The Auk: Ornithological Advances aims to advance fundamental scientific knowledge by increasing the basic knowledge of bird species, both living and extinct, and the knowledge of broad biological ...

Thanks to the “Adopt-a-book” benefit sponsored by the Friends of the Princeton University Library this spring, and specifically to the donations given by Ruta Smithson in honor of Andrew Smithson and ...

THE third volume of this exhaustive work has just made its appearance, and is not inferior to its two successors in its high standard. The value of this volume is heightened by a number of admirable ...