Abundance and Reproductive Success of Streaked Horned Larks (Eremophila alpestris strigata) in Multnomah County, OR: Breeding Season 2011

The following report details the results of fieldwork conducted in Multnomah County, Oregon during STHL breeding season 2011. This work was designed to delineate STHL breeding distribution and abundance at the county’s two known breeding sites; to identify habitat- and locality-specific values of reproductive success; to identify variables, if any, that are associated with reproductive success; and to identify sources of reproductive failure. The 2011 field season was the third successive year of this monitoring effort; this report provides a summary of results to date. 5