Philadelphia, Pennsylvania, USA.
Some recent authors place this species, along with L. genei, L brunnicephalus, L. ridibundus, L. serranus, L. maculipennis, L. hartlaubii, L. cirrocephalus, L. novaehollandiae and L. bulleri, in genus Chroicocephalus (the “masked gulls”)#R#R#R; within that group, present species and L. genei found to be basal#R#R. Monotypic.
W Alaska and S British Columbia E to E Quebec (SE Canada), and possibly N Maine (NE USA). Winters along Pacific coast S to Mexico (Nayarit) and on Atlantic coast to Florida and Greater Antilles; in mild winters, from Great Lakes to Gulf of Mexico.
Food and feeding
Status and conservation
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