All About Birds: Northwest US and Canada

Cornell Lab of Ornithology

A Celebration of Prairie Birds

Lynch, Wayne

Great Plains Birds

Powell, Larkin

Woody Plants of the Northern Forest: Quick Guide

Jenkins, Jerry

Woody Plants of the Northern Forest: A Photographic Guide

Jenkins, Jerry

Birds of Montana: Field Guide

Tekiela, Stan

Birds of Montana

Jeffrey S. Marks, Paul Hendricks, and Daniel Casey; Sponsored by Montana Audubon

Western Birds Backyard Guide: Bird Watchers Digest Backyard Guides

Thompson, Bill III

Great Places: Montana. A Recreational Guide to Montana's Public Lands and Historical Places for Bird

ROBBINS, Chuck

Small Mountain Owls

Rashid, Scott