Restart Bird Identification Expert

What was the SIZE of the Brown Gull-like bird you saw in Pennsylvania?



Pomarine Jaeger: The dar morph of this large jaeger is dark brown except for white patches near underwing tips and sides of under tail. Light morph has white neck, pale yellow collar, white lower breast, mottled breast band, sides. Thick bill, pale base, two long central feathers twisted vertically on tail. Diet includes fish and small birds. Strong steady flight with deep wing beats. Sexes are similar.
Parasitic Jaeger: The dark morph of this medium-sized jaeger has a brown body, darker cap and pale underwing patches near tips. Pale form has white underparts with brown breast band; intermediates between dark and light morphs occur. Diamond-shaped tail has elongated, pointed central feathers. Black bill, legs and feet. Alternates several deep flaps with glides and fast wing beats. Sexes are similar.
Black-capped Petrel: Large petrel with white underparts, dark brown to black back and upper wings, black cap, and white collar (this field mark is missing in some birds). Tail is long, dark, and wedge-shaped; underwings show broad dark margins. Hooked bill is dark, legs are pink. High arcing flight.
Cory's Shearwater: Large gray-brown shearwater, white underparts, pale yellow bill. Feeds at night on crustaceans and large sqiud it takes from the surface. Best identified by its relatively slow, languid flight compared to other shearwaters. Wings held downward. Soars on fixed wings if wind is up.
Leach's Storm-Petrel: This medium-sized petrel has a dark brown body and a white rump and under tail feathers. The wings are dark with a pale gray-brown bar on the upper wings. It has a long, dark forked tail, and a black bill, legs and feet. Its flight is bounding and erratic with frequent changes of direction and speed. It mainly feeds on fish, squid and shrimp. Sexes are similar. The Leach's Storm-Petrel now has two subspecies, the Townsend's Storm-Petrel and Ainley's Storm-Petrel. Split in 2016 by the American Ornithologist Union. Both are outside of North America.
Band-rumped Storm-Petrel: This is a black-brown storm-petrel with gray-brown wing bars and a conspicuous white band across the rump and large, slightly notched tail. It has a black bill, legs and feet. It has a buoyant, zigzag flight, alternating several rapid wing beats. It feeds on invertebrates, small vertebrates and sometimes carrion from the water's surface. The sexes are similar.
 
Restart Bird Identification Expert