The Inca tern (Larosterna inca) is a locally common bird of
the coastal regions of western South America.
It is easily distinguishable from other tern species by its
slate-grey plumage that is interrupted by white “moustaches” that extend behind
the bill for about 2 inches (5 centimetres). Both sexes have this feature. The
Inca tern can also be recognized from its bright red bill and feet.
The Inca tern is some 15-17 inches (38-44 centimetres) long
and it weighs 6-7 ounces (175-200 g).
The Inca tern is one of many species that depends for its
food on the nutrient-rich waters brought to the eastern Pacific by the Humboldt
Current. Its particular liking is for small anchovies. Large numbers can be
seen when sealions and humpback whales are feeding, so that they can dive for
the scraps that these large animals leave behind.
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