labelled on the map signboard as being for chousingha or four-horned antelope ([i]Tetracerus quadricornis[/i]), but at the time of my visit filled with common muntjac ([i]Muntiacus muntjak[/i]) with a sign on the fence for them.
For everything else at the zoo, see my review here:
http://www.zoochat.com/254/visit-assam-state-zoo-guwahati-10-a-358287/