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The western population, the California least tern, was listed as an endangered species in 1972 with a population of about 600 pairs.With aggressive management, mainly by the exclusion of humans via fencing, the Californian population has rebounded in recent years to about 4500 pairs, a marked increase from 582 pairs in 1974 when census work began, though it is still listed as an endangered ...
The California least tern (Sternula antillarum browni) is a subspecies of least tern that breeds primarily in bays of the Pacific Ocean within a very limited range of Southern California, in San Francisco Bay and in northern regions of Mexico. This migratory bird is a U.S. federally listed endangered subspecies. The total population of the ...
In December 2019, the International Union for Conservation of Nature (IUCN) listed 8460 least concern avian species. [1] Of all evaluated avian species, 76.9% are listed as least concern. No subpopulations of birds have been evaluated by the IUCN. This is a complete list of least concern avian species evaluated by the IUCN.
The avifauna of Indonesia include a total of 1809 species, of which 786 are endemic, and 3 have been introduced by humans. 150 species are globally threatened. This list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) follow the conventions of The Clements Checklist ...
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New Caledonian fairy tern, Sternula nereis exsul (Mathews, 1912) New Zealand fairy tern / Tara iti, Sternula nereis davisae ( Mathews & Iredale , 1913) Australia, New Caledonia,northern New Zealand
[5] [51] The Inca tern nests in crevices, caves and disused burrows, such as that of a Humboldt penguin. [52] The white tern is unique in that it lays its single egg on a bare tree branch. [53] Tropical species usually lay just one egg, but two or three is typical in cooler regions if there is an adequate food supply.
The Elegant tern also differs in a slightly longer, slenderer bill, while Chinese crested tern differs in a black tip to the bill and Sandwich tern a black bill with a yellow tip. Juvenile lesser crested terns resemble same-age Sandwich terns, but with a yellow-orange bill, and paler overall, with only faint dark crescents on the mantle feathers.