Distribution and Abundance of Streaked Horned Larks on the mid-Willamette Valley National Wildlife Refuge Complex, Breeding Season 2008

Although populations are vulnerable at present, strigata’s general ecological requirements provide opportunity for a cooperative (public and private sector) effort to effectively restore and protect populations before more stringent federal protections are required. Information on general habitat associations, population distribution, and population size is needed to facilitate development of habitat management recommendations and conservation strategies. This report focuses on strigata’s breeding distribution across the three mid-Willamette Valley National Wildlife Refuges (NWR’s). Because they contain good quality habitat that may be available for long-term management, these refuges contain some of the most important breeding sites remaining in the valley.

The following report is the result of exhaustive surveys conducted during breeding seasons 2006-2008. The report’s objective is to delineate breeding distribution and abundance at William Finley (Finley), Baskett Slough (Baskett), and Ankeney National Wildlife Refuges for these three consecutive breeding seasons. Because it is a comprehensive summary, it includes much of the information found in the 2007 report, “Streaked Horned Lark Distribution on the mid-Willamette Valley National Wildlife Refuge Complex.”