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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 ...
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 ...
It is a habitat of the endangered California red-legged frog, identifiable as the name implies by distinctive red markings on the legs. [2] It is also nesting habitat for the endangered California Least Tern .
Loss of habitat. In 1989, there was a big trapping of hundreds of foxes at Seal Beach National Wildlife Refuge. The red foxes were killed because they put a significant threat to two endangered species of birds, light-footed clapper rail and the California least tern. Even though an animal rights group had requested an injunction to prohibit ...
Tijuana Slough provides critical habitat for the federally listed endangered California least tern (Sterna antillarum browni), light-footed rail (Rallus obsoletus levipes) and least Bell's vireo (Vireo bellii pusillus), as well as the salt marsh bird's-beak (Cordylanthus maritimus maritimus), an endangered plant species.
Forty-two little tern chicks fledged during this year’s breeding season, the most recorded since 2006, according to the RSPB.
The wildlife refuge was established to protect the breeding habitat for the endangered California least tern and the threatened Western snowy plover.The refuge also provides Coastal sage scrub habitat for other endangered species, including the California tiger salamander (recently listed for protection under the Endangered Species Act), California red-legged frog, Morro blue butterfly, IUCN ...
The California least tern has more than tripled in number since it was put on the endangered species list, and has many colonies from San Diego Bay to the San Francisco Bay area. Most are fenced and protected from public access. The major cause for its decline was habitat destruction and alteration, as occurred in Mission Bay.