In Nepal, a creeping weed is destroying the habitat of endangered animals such as rhinoceros and deer. The plant, which was only introduced to Nepal in the last 15 years, has forced authorities to gear up for its elimination as its spread has been linked to recent killings of rhinos on an unprecedented scale.

Conservation Officers say the rapid spread of this weed has disturbed the original habitat of animals such as deer and rhinos by replacing the natural food of endangered wild animals. This plant has a bitter-sour taste which rhinos or deer can't tolerate, and it also covers the grazing field. So, for survival, the animals move to the nearby community forests which are frequented by poachers.

Of 10 rhinos poached in the last five months, nine of them were killed in community forests. Rhinos entering community forests are almost certain to be killed.

According to a research conducted by the Department of Plant Resources in 2003, it is not yet confirmed from where this invasive species came to Nepal. It is thought the plant was first seen after a massive flood in the Rapti River in 1993. Seeds of the plant, which is a native of Central and Latin America, might have been brought here by the flood.

The growth rate of the plant is rapid due to its high resistance to all unfavorable conditions and it has encroached the area within a short span of time.

In order to control the spread of this weed, the National Park Management team with the coordination of locals has started a process of biological control.