Figure 1.

Collecting intensity of Anthidium by ecoregion in the Western Hemisphere. Number of collection events defined as unique date and latitude and longitude combinations per each WWF ecoregion (Olson et al. 2001). The 10 ecoregions with the highest number of events were: Great Basin shrub steppe, 1199; California coastal sage and chaparral, 930; Colorado Plateau shrublands, 782; California interior chaparral and woodlands, 768; Chihuahuan desert, 648; Mojave desert, 348; Sierra Nevada forests, 317; Chilean matorral, 314; Colorado Rockies forests, 303; and California Central Valley grasslands, 296.