A major seabird colony is located in the area of Baillarge Bay. Seabird colonies are also located on Bylot Island which have a large colony and nesting area of greater snow geese. More than seventy species of birds have been recorded here, of which about forty are known to breed. The park is known to be an important bird sanctuary. In 1965, Bylot Island enclosed within the park was also declared as a "Migratory Bird Sanctuary" in view of the large number of migratory birds in the area. A record 100,000 birds are reported to pass the park during summer months every year, and the large geese population of the island is known to constitute the most abundant herbivores of the island. On some of Bylot Island's rugged cliffs within the park, thousands of nesting birds can be found including 300,000 thick-billed murre and 80,000 black-legged kittiwake.