Chroicocephalus philadelphia
Bonaparte’s Gulls are sleek, small gulls that breed in the boreal forest and winter farther south on ocean coasts, lakes, and rivers. Adults have black heads and red legs in the summer; in winter they have a neat gray smudge near the ear. They fly with ternlike agility, flashing bright white primaries that form a distinctive white wedge in the upperwing. Bonaparte’s Gulls capture flying insects and pluck tiny fish from the water with equal ease. They are unusual among gulls in their use of trees for nesting.
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