Synthetoceras is the first in our weekly series of "Extinct Mammals with the Craziest Headgear." It roamed the American plains several million years ago. Special thanks to illustrator Lucas Lima for creating the images in this series.
Snipe-rail (Capellirallus karamu) was a small flightless rail with particularly tiny wings but well developed legs. It was estimated to have been about 240 g in weight, which makes it a bit larger than a banded rail. The snipe-rail was remarkable for its very long and slender curved bill (about 7 cm long), which was longer, in proportion to the size of the bird, than that of any other rail.