They are initially grey, and become green with a yellow dorsal stripe. They have a brown head. Initially they feed only on the undersides of the leaves, leaving the upper leaf membrane intact. Later they attack the central shoot, feeding communally in a web. Over their larval period of about three weeks, they grow to a length of about 2 cms.
The species is found from South Africa through India to the Pacific.
My friends see in the school and we put it in the box in the classroom. It's green and grow quite fast. It can eat flower and leaf.