FIG. 2.

Distribution of black-tailed prairie dog colony sizes at plague and plague-free sites. Areas with no history of plague (Badlands/Conata Basin and Wind Cave), as well as Thunder Basin in 2001, have colonies distributed throughout the range of colony sizes including >250 ha. With the exception of one colony at Thunder Basin after the 2001 epizootic, and one colony at Comanche in 2005, colony complexes with a history of plague (Cimarron, Comanche, Kiowa/Rita Blanca, and Thunder Basin 2002–2004) have all their colony area in colonies of 250 ha or less.