| geographic variation in the community structure of lice on western scrub-jays. | parasites are incredibly diverse. an important factor in the evolution of this diversity is the fact that many parasite species are restricted to 1, or just a few, host species. in addition, some parasites exhibit geographic specificity that is nested within their specificity to a particular species of host. the environmental factors that restrict parasites to particular regions within the host's range are poorly understood, and it is often difficult to know whether such patterns of geographic s ... | 2009 | 18576864 |