The photo didn't come out too well - the deer statues behind muddle it up - but on the posts in the foreground are antlers of the different deer species held in the adjacent walk/drive-through area, namely sambar, Eld's deer and hog deer.
See here for a review of my visit (in January 2014):
http://www.zoochat.com/2182/zoos-burma-5-naypyitaw-zoo-14-a-362193/
