June 19, 2014 – Black Skimmer. A large, black and white, tern-like waterbird, the Black Skimmer has a distinctive large red bill. Typically skimmers fly low over the water with the lower mandible cutting the surface hoping to catch small fish. Skimmers are the only birds with the lower mandible longer than the upper. When at rest, they often group together on sand and gravel bars, their black backs and white underparts visible at long distances.