Cahow, or Bermuda Petrel, an ocean bird that nests only in Bermuda. Like other petrels, the bird lives at sea for seven or eight months, returning to shore to nest in burrows and raise its young. The bird's plumage is brown with white markings.
During a famine in Bermuda, 1609–21, great numbers of cahows were slaughtered for food. The species was long thought to be extinct, but in 1951 a number of cahows were found living on islets off Bermuda. The cahow is an endangered species.
The cahow is Pterodroma cahow of the shearwater family, Procellariidae.