The 2004 Tricolored Blackbird April Survey

Abstract

A survey of Tricolored Blackbirds (Agelaius tricolor) was conducted in the Central Valley of California from 16-19 April 2004. The goals of the survey were to visit all historical Central Valley breeding colonies where 2,000 or more birds had been previously documented, estimate the sizes of any colonies encountered, and document habitat status of historical sites.