Northern FulmarFulmarus glacialis
18" (46 cm). A stocky gull-like seabird, seldom seen from shore. 2 color phases are common: pale gray on back and wings, white elsewhere (the phase most common in the East); and uniformly dark gray. Intermediates, as well as nearly all-white birds, also occur. Bill yellow. Easily distinguished from a gull by its flight: several fast wingbeats followed by a stiff-winged glide.