Range. - North Atlantic coast, breeding in Cumberland Sound and wintering as far south as Long Island.

This bird differs from the Glaucous-winged only in the pattern of the gray markings of the primaries and in having a little lighter mantle. It is quite common in its breeding haunts where it places its nest high up on the ledges of the cliffs. The eggs are not different apparently from glaucescens.

Great Black backed Gull Kumlien's Gull

Great Black-backed Gull. Kumlien's Gull.