Chinstrap Penguin

The chinstrap penguin grows to a length of 68–76 cm (27–30 in) and a weight of 3.2–5.3 kg (7.1–11.7 lb), varying with the time of year. Males are greater in weight and height than females. The adult chinstrap's flippers are black with a white edge; the inner sides are white. The face is white, extending behind the eyes, which are reddish brown; the chin and throat are white, as well, while the short bill is black. The strong legs and the webbed feet are pink. Its short, stumpy legs give it a distinct waddle when it walks. The chinstrap penguin's black back and white underside provide camouflage in the form of countershading when viewed from above or below, helping to avoid detection by its predators.

Chinstrap penguins have a circumpolar distribution. They breed in Antarctica, Argentina, Bouvet Island, Chile, the French Southern Territories, and South Georgia and the South Sandwich Islands. Vagrant individuals have been found in New Zealand, Saint Helena, Tristan da Cunha, and South Africa.

The diet of the chinstrap penguin consists of small fish, krill, shrimp, and squid, which they swim up to 80 km (50 mi) offshore each day to obtain. The chinstrap penguin's tightly packed feathers provide a waterproof coat, enabling it to swim in freezing waters. Additionally, thick blubber deposits and intricate blood vessels in the flippers and legs help retain heat. The main predator of the chinstrap penguin at sea is the leopard seal (Hydrurga leptonyx). Every year, the leopard seal causes the chinstrap's population to decrease by about 5-20%. On land, the brown skua (Stercorarius antarcticus), south polar skua (Stercorarius maccormicki), and southern giant petrel (Macronectes giganteus) are the primary predators of the penguin, most often preying on eggs and young. The Antarctic fur seal is also known to kill chinstrap penguins occasionally.