Global Ecology and Biogeography
The degree to which a species is predictably encountered within its range varies 36 tremendously across species. Understanding why some species occur less frequently within their 37 range than others has important consequences for conservation and for range map based analyses 38 of ecological patterns. We examined whether patterns in geographical range occupancy can be 39 explained by species level traits.
Hurlbert, A.H., and E.P. White. 2007. Ecological correlates of geographic range occupancy in North American birds. Global Ecology and Biogeography 16:764773.