(A) We observed high among-site variation in mean annual radar counts of landward-flying targets in the Olympic Peninsula, Washington, but (B) low among-year variation in mean (± SE) radar counts of landward-flying targets.

The three drainages (Quilcene, Dosewallips, and Duckabush) sampled during all eight years of our study are the “eight-year data set.” These three sites, along with the four sites that were sampled during the last six years of the study (Cushman, Queets, Crescent, and Elwha sites) are the “six-year data set.” (C) Radar counts were not significantly related to annual densities (± SE) of Marbled Murrelets observed during at-sea surveys in the San Juan Islands during 1996–2004. (D) In contrast to the lack of year effects in radar counts, at-sea estimates of murrelet numbers (± SE) in the waters surrounding the Olympic Peninsula increased by ~71% between 2000 and 2003 (Miller et al. 2006).