 Cameron and McClure compiled reports of hispid cotton rat population densities.The mean hispid cotton rat population density range for all studies was 5.3 to 31.1 rats per hectare.Population density ranges in Texas include 1 to 14 rats per hectare in coastal prairie, 17 to 84 rats per hectare in unmowed right-of-ways, 9 to 29 rats per hectare in old fields, 6 to 54 rats per hectare in abandoned fields, and 0.7 to 5 rats per hectare in grass-prickly-pear ("Opuntia" spp.