 I'm here on Muddy Mountain in Central Wyoming and today I want to talk to you about life on the edge. The colleges have long known that zones where communities meet provide the wider selection of plants and animals. They call this the edge effect. Boundaries between natural communities may be sharp, but more often are a gradual as seen where the Aspen Grove meets a small sagebrush grassland. These zones between the communities are vital to wildlife. Aged may feed in the open grassland and flee the tree cover in protection at the slightest hint of danger. Community boundaries tend to continually shift back and forth with changes in the environment. A wildfire, for instance, would cause the Aspen groves to shrink and subsequently cause the size of the grassland to increase. So as you explore Wyoming's great outdoors, just remember that life on the edge is very exciting. This has been Tom Hill from the Cooperative Extension Service of the University of Wyoming exploring the nature of Wyoming.