The geysers aren`t the only thing foaming at the mouth. Yellowstone National Park officials are warning travellers to steer clear of wildlife after a `zombie` deer was found dead near Yellowstone Lake, a hotspot in-side the heavily-visited natural landmark.

The deceased adult mule deer suffered from chronic wasting disease, or CWD, a contagious and fatal sickness that infects deer, reindeer, elk and moose, causing zombie-like symptoms including excessive drooling, drooping ears, head tremors, teeth grinding and reluctance to move. There is currently no vaccine or known treatment for the disease. The deer, previously captured and tagged by the state`s Game and Fish Department (WGFD)in March, died sometime in October, according to its GPS collar. The carcass tested positive for CWD.•