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Gulls are typically gray or white, often with black markings on the head or wings. They have stout, longish bills and webbed feet. Terns are a group of generally medium to large seabirds typically with grey or white plumage, often with black markings on the head. Most terns hunt fish by diving but some pick insects off the surface of fresh water.
A red stripe runs along the middle of the ventral hindwing. P. marcellus has two seasonal forms, one occurring in the spring and the other in the summer. Spring forms are smaller, more white, and have short, black tails with white tips. Summer forms are larger, have broader black stripes, and longer, black tails with white edges. [2] [5]
Adults have black and white stripes on their head, a gray face, brown streaked upper parts and a long tail. The wings are brown with bars and the underparts are gray. Their bill is pink or yellow. They are similar in appearance to the white-throated sparrow, but do not have the white throat markings or yellow lores. [3] Measurements: [4]
Led by the American Ornithological Society, groups in PA and across the US are reviewing avian names to decouple birds from racism and boost inclusion. These Pennsylvania birds will be renamed as ...
It has a white forehead and a white stripe behind the eye, and its lores and the upper borders to the white forehead are black. The killdeer also has a white collar with a black upper border. The rest of the face is brown. The breast and belly are white, except for two black breast bands. It is the only plover in North America with two breast ...
There are two adult plumage variations known as the tan-striped and white-striped forms. On the white-striped form the crown is black with a white central stripe. The supercilium is white as well. The auriculars are gray with the upper edge forming a black eye line. [6] On the tan form, the crown is dark brown with a tan central stripe.
Their undertail is white [11] and they have a short, blunt chicken-like bill that is a light grey color, [2] [11] which in summer is encircled by a broad black band (hence the name). In the summer, its throat is black. [2] There is no sexual dimorphism. [13] Juveniles have black and white stripes and look more like winter adults. [2]
The male is brightly colored with a black and white horizontally striped head and contrasting burnt orange throat, breast and nape. The remainder of the belly is light grey. There are two color variations: green-backed (generally northern) and black-backed (generally northern). [2]