There are fears of possible transmission of diseases from cattle to wildlife. In 1968, large numbers of gaur were killed in an outbreak of rinderpest. Lantana bush introduced by British in the 19th century in tea gardens has spread rapidly at the cost of other valuable herbs and saplings. This bush is thorny, attracts mosquitoes, is not eaten by any herbivores and rapid spread has caused other species of fauna to vanish which is staple food for wild life. Rapid spread of Parthenium ("Parthenium hysterophorus") has severely damaged bio-diversity and typical landscapes of this beautiful jungle is making way for this invasive weed.