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 may increase mortality. Roads, streams, and lakes may serve as barriers to sylvatic plague. Black-tailed prairie dogs are frequently exterminated from ranchland, being viewed as pests. Their habitat has been fragmented, and their numbers have been greatly reduced. Additionally, they are remarkably susceptible to plague. In 2006, all eight appearances of plague in black-tailed prairie dog colonies resulted in total colony loss. Studies in 1961 estimated only of occupied black-tailed prairie dog habitat in the United States. A second study in 2000 showed . However, a comprehensive study between 10 states and various tribes in 2004 estimated in the United