A capped langur on a bamboo tree in Sylhet, Bangladesh. Previously the langur’s troupe were frequent visitors to this tea estate, but now they come only once or twice a year. The langurs, like so many other animals, are suffering from habitat loss.

Though all bamboos spread by rhizomes or underground stems (like that in Ginger), Clumping types of bamboo plants spread much slower compared to the running types as they have much shorter rhizomes. 

They basically stay together.