FURTHER EVIDENCE FOR A POPULATION DECLINE IN THE WESTERN WARBLING VIREO

Abstract

Recently, Gardali et al. (2000) reported that mist-net capture rates of breeding and migrating Western Warbling Vireos (Vireo gilvus swainsonii) had declined in Marin County, California, from 1979 to 1997. However, evidence of a population decline from a single site may be misleading and could simply represent site-specific changes in abundance.