Mexican prairie dog of prairie dogs and associated species, such as shorebirds and birds of prey. Pronatura Noreste, as of February 2007, has signed conservation easements with "ejidos" and private owners for the protection of more than 42,000 acres (170 km) of Mexican prairie dog grasslands. Mexican prairie dog The Mexican prairie dog ("Cynomys mexicanus") is a diurnal burrowing rodent native to Mexico. Treatment as an agricultural pest has led to its status as an endangered species. They are closely related to squirrels, chipmunks, and marmots. "Cynomys mexicanus" originated about 230,000 years ago from a peripherally isolated population of the more widespread "Cynomys
Black-tailed prairie dog Infanticide partially or totally eliminated 39% (361 individuals) of all litters. Lactating females were the most common killers. Mortality of young was highest due to heavy predation during the winter and early spring following birth. Mortality increases with dispersal from a colony or coterie. Sylvatic plague, caused by the bacterium "Yersinia pestis", can quickly eliminate entire black-tailed prairie dog colonies. Once infected, death occurs within a few days. Black-tailed prairie dogs are also susceptible to diseases transmitted by introduced animals. The most common predators of black-tailed prairie dogs are coyotes ("Canis latrans"), American badgers ("Taxidea taxus"), bobcats ("Lynx rufus"), golden