Inca Tern (Larosterna inca)

This is one of the strangest of all terns and is placed in its own unique monotypic genus. The name "Larosterna" is a mash-up of "Larus" (gull) and "Sterna" (tern). Its large size and plumage suggest intermediacy between gulls and terns. This photo shows the bizarre white plumes starting at the bill and curling down around its neck. Although locally common, it is classified as "Near Threatened" by IUCN because of population declines. Threats include over-fishing and disruption of nesting from guano harvesting.