West Virginia has the fewest species (26), while Texas has the most species (85). A determination of absolute numbers of mosquitoes for each state is extremely difficult, however, as mosquito populations tend to be focal, depending upon amount of breeding habitat, potential hosts and climatological factors – regardless of the number of species. Thus, relatively dry places like Nevada, Arizona and New Mexico may have intense mosquito activity in areas where water is present. Alaska has a relatively short season, but biting activity during that time is prodigious, indeed. Mosquitoes are particularly prolific in areas with rice farming, extensive salt marsh or dredge spoil.