The black-necked grebe (Podiceps nigricollis), known in North America as the eared grebe, is a member of the grebe family of water birds. It occurs on every continent except Australia and Antarctica.
The black-necked grebe is an excellent swimmer and diver, and pursues its prey underwater, eating mostly fish as well as small crustaceans, aquatic insects and larvae. It prefers to escape danger by diving rather than flying, although it can easily rise from the water.
Like all grebes, the black-necked grebe nests on the water's edge, since its legs are set very far back and it cannot walk well. Usually two eggs are laid, and the striped young are sometimes carried on the adult's back.
The black-necked grebe is 28–34 centimetres (11–13 in) long. The adult is unmistakable in summer, with a black head and neck and yellow ear tufts. In winter, this small grebe is white with a poorly defined black cap, which distinguishes it from the crisper-looking Slavonian grebe (horned grebe in America).
The black-necked grebe is essentially flightless for most of the year (9 to 10 months), and is one of the most inefficient fliers among avifauna. Generally, it avoids flying at all costs and reserves long-distance flight exclusively for migration. However, when migrating, it will travel as much as 6,000 km (3,700 mi) to reach prosperous areas that are exploited by few other species. From Wikipedia, the free encyclopedia
No comments:
Post a Comment