METHODS Monitors for each site that had least tern nesting in 2008 or who planned monitoring activities for 2009 were provided datasheets prior to the arrival of adult terns (Appendix A). The smallest of American terns, the Least Tern is found nesting on sandy beaches along the southern coasts of the United States and up the major river systems far into the interior of the continent. 0000003563 00000 n Primary foraging sites for these opportunistic feeders are shallow estuaries and lagoons where they look for small fishes such as anchovy, smelt, silversides, shiner surfperch, and small crustaceans. This migratory bird is a U.S. federally listed endangered subspecies. 4010 Morena Blvd, Suite 100, San Diego CA 92117 Add To My Calendar Terns have been a federally endangered species in California since 1970. Increasing urbanization and habitat loss have led to the decline of its population and shifted much of the nesting to less traditional colony sites such as landfills and airports (California Least Tern Recovery Team 1977). California least terns breed as monogamous pairs laying eggs in mid-May, but settle in loose colonies on the beach of usually 20 to 50 pairs. H�b```e``�"��@��(���� &���Pn��sfu>Ue���9�1�b�����`�a����m�s���&�f��.9&6Y�5ʇnȚ�Q� There was a total of six nests at SAN, which is a historically low number. These latest monitoring efforts were continued for the 2009 breeding season in California. The fledgling to breeding pair ratio was 0.37 to 0.68. 0000001653 00000 n California least tern breeding pairs established 6038 nests and produced 2136-2859 fledglings at 48 documented locations across California. To the San Diego County Regional Airport Authority and the airport’s many contractors and tenants, as well as the U.S. Prohibiting any activities within the least tern ovals themselves. California Least Tern Conservation. 0000057547 00000 n In Los Angeles County, it returns to only a few breeding colonies, one at Venice Beach, one at the Port of Los Angeles, and a relatively new colony at Malibu Lagoon State Beach. 0000005785 00000 n MORE INFO ›. California least tern breeding success and these data were compiled into annual summary reports. 0000003013 00000 n 0000004086 00000 n This species is in danger of extinction throughout all or a significant portion of its range. To learn more about SAN’s commitment to California Least Terns, please click here. California Least Tern (Sternula antillarum browni - Mearns, 1916) Estimated population of ~ 4,500 pairsThey summer along the Pacific coast of North America - from central California (San Francisco Bay) to southern Baja California and western Mexico. The least tern (Sternula antillarum) is a species of tern that breeds in North America and locally in northern South America.It is closely related to, and was formerly often considered conspecific with, the little tern of the Old World.Other close relatives include the yellow-billed tern and Peruvian tern, both from South America.. 0000002992 00000 n It is 21-23 cm (around 8¼ to 9 inches) long. from Baja California to the San Francisco Bay; the Interior Least Tern nests along the major tributaries throughout the interior U.S. from Montana to Texas and New Mexico to Louisiana; and the Eastern Least Tern (S. a. antillarum) nests along the coast from Texas to Maine. Title Least Tern Range - CWHR B234 [ds1507] Publication date 2016-02-0100:00:00 Presentation formats digital map FGDC geospatial presentation format vector digital data Other citation details These are the same layers as appear in the CWHR System software. We now think the tern should be listed as "threatened." 0000003542 00000 n Chicks are hatched and raised during the summer months, usually 2 to 3 per nest. California Least Tern, with chick under tile, at Alameda Point. 0000057523 00000 n The California Least Tern, Sternula antillarum brownii, 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 and extreme northern Mexico. In 1973 to approximately 5000 in 2013 ( CDFW 2014 ) produced 2136-2859 fledglings at 48 documented locations across.. You can see a black wedge on the California Least Terns are about half the size of,. 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