Human activities have led to the introduction of many invasive species in the Everglades National Park. Some of the non-native floral species that are found here include the Australian melaleuca tree, Old World climbing fern, Chinese privet, and Brazilian peppertree. The invasive faunal species include the Asiatic clam, lobate lac scale insect, bromeliad beetle, Mayan cichlid, walking catfish, Cuban tree frog, Monk parakeet, Burmese python, Nile monitor, and wild boar. To prevent new invasions and to keep the invasive species in check, the Comprehensive Everglades Restoration Plan was introduced by the US Government in 2000. In addition to these introduced plant and animal species, the Everglades National Park is also threatened by urban development, water diversion, pollution, and agricultural expansion.