Oculudentavis khaungraae was likely the size of the smallest-living hummingbird ... contain the most teeth ever found in an ancient bird. “There’s over 100 teeth present in the jaws ...

In pursuit of the world’s smallest bird, we’ve come to the backyard of ... After Clark downloads video of the dive—the first ever recorded of this species at that high camera speed—he ...

The smallest bird in the grouse family, the white-tailed ptarmigan is ... threatening to push the treeline — and the ptarmigan — to ever-higher elevations, until there's no more room to rise. And ...