They have the capability to stay under water for lengthy periods of time. How they could stay underwater so long is not fully understood. The characteristics generally held in common by ducks when compared to geese and swans are the small body size, shorter necks, narrower wings which are more pointed, and wing beats which are more rapid. The characteristics generally held in common by ducks when compared to geese and swans are the small body size, shorter necks, narrower wings which are more pointed, and wing beats which are more rapid. Most ducks feed on aquatic vegetation.
Some Asiatic species feed on fish.
Like Penguins ducks too dive under water in search of food. Rhinoceros Dinosaurs Rhinoceros are large animals commonly identified by the possession of either one or two horns on the muzzle. These are not true horns, but a mass of compacted fiber. Sumatran, Indian, Black, and White. Black and White Rhinoceros are found in Africa.