Chinstrap Penguins are one of the two species introduced in version 1.5j.
In the wild, Chinstrap Penguins behave like other animals. They only spawn in the taiga biome. When attacked, all other Chinstrap Penguins around will get mad and attack you. Their call lengths vary based on their health.
When right-clicking any Chinstrap Penguin with a raw fish, there is a 1/3 chance it will be tamed, even if it is angry. Tamed penguins wear red bow ties. You can shear a tamed Chinstrap Penguin by right-clicking it with shears in your hand. There is a 66% chance it will drop black striped or white Penguin Feathers, but a 33% chance it will become angry and attack; however, other penguins will not attack you in this situation. Note that tame penguins can be bred with wheat.
Chinstrap Penguins will drop 0-2 black Penguin Skins on death.