The third auklet species on St Paul and the most flamboyantly attired is the Crested Auklet (Aethia cristatella). The Crested breed on the Aleutian and Pribilof Islands and prefer to spend their winters just off shore.
These auklets exhibit a behavior that is unique in birds. They rub each other with a citrus-like scent secreted in feathers on their back. This behavior is called alloanointing and while common in mammals, it has only been documents in Crested Auklets. It's thought that this behavior might help to ward off parasites.
The crested Auklet lays one egg and both parents help to incubate. They eat plankton and small crustaceans. A small pouch under the birds tongue helps them transport the plankton to their chicks.