Andean Gull [Larus (Chroicocephalus) serranus] Adult nonbreeding plumage. Juvenile plumage is similar but bill is dark reddish with black tip and legs are dark reddish. Monotypic if treated in the genus Chroicocephalus. The Andean Gull would be the only species in the genus. Near Cusco, Cusco...
Andean Gull [Larus (Chroicocephalus) serranus] Breeding plumage adult. If treated under the genus Chroicocephalus the Andean Gull would be monotypic. Near Cusco, Cusco Region, and District, Peru. Eastern slope of the Andes in Rio Vilcanota, ca. 3300 m elevation. Humid Temperate Live Zone...
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