Chinstrap Penguins (Pygocelis antarcticus) have a circumpolar distribution, and occur on subantarctic islands and Antarctic shorelines. They average 72 cm (28 inches) high, and weigh between 3-5 kg (6.6-11 lb).

They hunt for krill, shrimp, squid and fish at distances up to 50 km offshore. They nest in rookeries and build shallow nests of small stones to keep their eggs dry and to protect them from freezing. There is stiff competition amongst the birds for suitable stones, and theft of stones from nests is common. Chinstrap Penguin rookeries are very smelly because of the build-up of droppings around the nests and along the trails used by the birds to move to and from the sea to their nests. Their droppings are pink from the carotene pigments in their prey and foul their breast feathers. The adult birds often walk the long distance to the sea to bathe and to feed before walking up hill back to the rookery on 'penguin highways'.

Chinstrap Penguins breed during the austral summer, and usually raise two chicks. Both parents share incubation of the eggs and rearing of the chicks. The main predator of Chinstrap Penguin eggs and chicks is the Brown Skua. This colony is on Half Moon Island, Antarctica.