Type: report
Article abstract: Surveys for the endangered least Bell's vireo (Vireo bellii pusillus) were conducted at Marine Corps Base Camp Pendleton, California, between 31 March and 14 July 2008. Drainages containing riparian habitat suitable for vireos were surveyed two to seven times. Seven hundred and thirty-eight territorial male vireos and 31 transient vireos were detected on 18 out of the 23 drainages/sites surveyed. Ninety-six percent of all vireo territories occurred on the ten most populated drainages, with the Santa Margarita River containing 61% of all territories on Base. Seventy-eight percent of male vireos were confirmed as paired.
Number of pages: 96
Authors: Lynn, Suellen; Kus, Barbara;
Year: 2008
Purpose: The purpose of this study was to document the status of least Bell's vireo at Marine Corps Base Camp Pendleton in San Diego County, California. Specifically, our goals were to (1) determine the size and composition of the least Bell's vireo population at the Base, (2) characterize habitat used by vireos, (3) band a subset of vireos to facilitate the estimation of vireo survivorship and movement, and (4) assess the short-term effects of giant reed removal on vireo fecundity, nest success, and productivity by intensively monitoring vireos within established nest monitoring sites that had recently undergone giant reed removal and at reference sites in which giant reed had been removed 9-11 years earlier, between 1997 and 1999.
Prepared for: Assistant Chief of Staff, Environmental Security U.S. Marine Corps Base Camp Pendleton;
Prepared by: U.S. Geological Survey, Western Ecological Research Center;
Keywords: bird surveys; endangered species; least Bell's Vireo; Marine Corps Base Camp Pendleton;
Species: Least Bell's vireo
Vegetation communities: riparian forest & scrub