Search results
Results from the WOW.Com Content Network
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 avian family Laridae comprise the noddies, skimmers, kittiwakes, gulls, and terns. The International Ornithological Committee (IOC) recognizes these 104 Laridae species distributed among 22 genera. This list is presented according to the IOC taxonomic sequence and can also be sorted alphabetically by common name and binomial. Common name Binomial name IOC sequence African skimmer Rynchops ...
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 ...
Genus Sternula – F. Boie, 1822 – seven species Common name Scientific name and subspecies Range Size and ecology IUCN status and estimated population Little tern. Sternula albifrons (Pallas, 1764) temperate and tropical Europe and Asia. Size: Habitat: Diet: LC Least tern. Sternula antillarum Lesson, 1847
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.
Endangered (EN) species are considered to be facing a very high risk of extinction in the wild. In December 2019, the International Union for Conservation of Nature (IUCN) listed 460 endangered avian species. [1] Of all evaluated avian species, 4% are listed as endangered. No subpopulations of birds have been evaluated by the IUCN.
Most species are pale grey above and white below with a contrasting black cap to the head, but the marsh terns, the black-bellied tern, the Inca tern, and some noddies have dark body plumage for at least part of the year. The sexes are identical in appearance, but young birds are readily distinguishable from adults.
The call is a loud grating noise like Sandwich tern. The grey rump is a useful flight identification feature distinguishing it from the related species. 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.