Their breeding range is the North Atlantic on coasts influenced by the Gulf Stream, the exception being the colonies of the Gulf of Saint Lawrence and the islands off the east coast of Canada.
Their breeding range is the North Atlantic on coasts. These coasts are influenced by the Gulf Stream. These coasts were being the colonies of the Gulf of Saint Lawrence off the east coast of Canada. These coasts were being the colonies of the Gulf of the islands off the east coast of Canada. The Gulf Stream is the exception.