Natural range barrier
glossary and government resources
Natural range barrier
:
a river, rock face, dense timber or any other naturally occurring feature that stops or significantly impedes livestock movement to and from an adjacent area. [Ministry of Forests -- Government of British Columbia]
MONGABAY.COM
Mongabay.com seeks to raise interest in and appreciation of wild lands and wildlife, while examining the impact of emerging trends in climate, technology, economics, and finance on conservation and development (more)