A First Count of Thick-billed Murres (<i>Uria lomvia</i>) and Black-legged Kittiwakes (<i>Rissa tridactyla</i>) Breeding on Bylot Island

Bylot Island, part of Sirmilik National Park, supports two major breeding colonies of intermingled Thick-billed Murres (Uria lomvia) and Black-legged Kittiwakes (Rissa tridactyla): at Cape Hay near the northwest tip and at Cape Graham Moore at the opposite end of the island. Although the size of these colonies has been estimated previously, there is no information on how the estimates were made, except for Thick-billed Murres at Cape Hay in...