The Rhinoceros Auklet is named for the horn at the base of its bill. It is in the genus cerorhinca (horn-nose) from the Greek keras, horn, and rugkhos, snout.
By August, most young birds are living on their own. Adult birds have completed their job of raising young as best they could and are now released from parenting obligations. It is time for migrating birds, both young and old, to focus their energy on completing their annual cycle of life and set out on their return migration to the south.