Red-billed Gull (Chroicocephalus scopulinus)
Hartlaub's Gull (Chroicocephalus hartlaubii)
Brown-hooded Gull (Chroicocephalus maculipennis)
Gray-hooded Gull (Chroicocephalus cirrocephalus)
Andean Gull (Chroicocephalus serranus)
Black-billed Gull (Chroicocephalus bulleri)
Brown-headed Gull (Chroicocephalus brunnicephalus)
Black-headed Gull (Chroicocephalus ridibundus)
Slender-billed Gull (Chroicocephalus genei)
Bonaparte's Gull (Chroicocephalus philadelphia)
