SPOKANE, Wash. (AP) — A new study shows that different types of deer react differently when approached by hungry wolves.

Researchers at the University of Washington recently studied how wolves are interacting with two species of deer in the state: white-tailed and mule deer.

The study found that white tailed deer are graceful runners who will seek flat ground in an effort to outrun wolves.

But mule deer have developed a quick jump escape technique that makes them appear to be bouncing on a pogo stick. This is effective for escaping on uneven, rocky ground.

The researchers found that mule deer will move to higher elevations and steeper slopes to avoid the predators.

White-tailed deer are more comfortable running from wolves and sometimes move to flatter ground, where they can better see wolves coming.

Story re-posted from San Francisco Chronicle.