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



Laysan Albatross: Large seabird with dark brown back, white head, neck and rump, dark eye patch. Bill is thick and yellow with gray hooked tip. Wings dark brown above and white below, with irregular brown-black borders, dark brown-black with white coverts, and pink legs and feet. Feeds on fish and invertebrates. Dynamic soaring, stays aloft for hours with little flapping of wings. Sexes 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.
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.
Blue-footed Booby: Large, gull-like seabird with white body, brown wings and brown-streaked head and back. The blue-gray bill is long and stout. Legs and feet are powder blue. Plunge dives for fish from 50 feet above shallow water. Alternates rapid, deep wing beats with sailing glides.
Brown Booby: This large seabird is mostly dark brown with white under wing coverts, belly and vent. It has a blue-gray to yellow bill and yellow legs and feet. To acquire food, it plunge dives from 30 to 50 feet. It feeds on parrot fish, flatfish, mullets and other fish. It has alternating strong rapid wing beats and glides. The sexes are similar.
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.
Black Storm-Petrel: Small seabird, brown-black overall with long, dark wings showing pale bar on upper side, and forked tail. The hooked bill is dark and has a tube on top. Legs and feet are black. Flight is mothlike with deep, steady wing beats. Comes closer to shore than most other storm-petrels.
 
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