This is a crow-sized diving bird of the mainland coasts. They breed in the Arctic and Sub-Arctic coasts south to central California on the pacific side and on the east coast to the Gulf of Saint lawrence.
Nesting on high cliffs the young plunge 50 to 100 feet down to the water first diving and later flying off with their parents. Even though only one egg is laid each year the common Murre’s population seems to remain stable. Oil spills being their biggest threat.