Figure 3. Diversity estimates of warblers at banding stations.

Estimated number of vagrant warbler species (A) at the 11 stations with at least one species of vagrant recorded; percent values indicate the proportion of warbler species richness represented by vagrants. Estimated total warbler species (B) at all 28 bird capture stations, with standard error bars, and grouped (colored) by the eight biogeographic regions in southern Oregon and northern California between 1992 and 2008.