Man introduced non-native burros into a desert ecosystem in the late 19th century. Burros have successfully filled the vacant niche. Burro population size now numbers approximately 1,500 animals and is increasing. Field evidence indicates feral animals have seriously affected native flora and fauna of the region and threaten the viability of Death Valley National Monument as a natural area of the National Park System. Environmental damage includes soil damage and accelerated erosion, vegetation destruction, spring and waterhole disturbance, and competition with native wildlife for food, water and space. Habitats of rare or endemic plants and animals may be threatened. National Park Service management problems and efforts to control burro impact are discussed.
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