Flora and fauna of the Greater Yellowstone Ecoystem. The Greater Yellowstone Ecosystem is one of the last remaining large, nearly intact ecosystems in the northern temperate zone of the Earth.

This project is not associated with the USGS project described here:

http://rockyweb.cr.usgs.gov/html/gye/

However, this map does provide a useful definition of the range of project:

http://rockyweb.cr.usgs.gov/html/gye/gyacountyoverlay.gif less ↑