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An easy-to-use, waterproof, pocket-size guide, Birds of Oklahoma introduces the varied and colorful birdlife observable from the Great Plains in the west to the Ouachita Mountains in the east.

A handy, pocket-size guide, Birds of New Mexico introduces the state's varied and colorful species, like rosy finches atop Sandia Peak or sandhill cranes in Bosque del Apache National Wildlife Refuge.

A handy, pocket-size guide, Birds of Kansas introduces the state's varied and colorful species, from waterfowl concentrations at Cheyenne Bottoms to greater prairie-chickens in the Flint Hills.

A fact-filled, pocket-size resource for all outdoor and nature enthusiasts, Snakes of North Texas is a handy identification guide to serpent species of the Lone Star State.

An excellent resource for all outdoor and nature enthusiasts, Snakes of Central Texas is a fact-filled, pocket-size identification guide to species of serpents in the Lone Star State.

Get to know the guardians of the forest with this handy guide. Trees of the Pacific Northwest helps you learn about 40 of the most common species found in the mossy, misty woods you love to explore.

With nearly 100 wildflower species growing across this natural wonderland, Wildflowers of the Northern Rocky Mountains covers the spectrum of color in all its unique, naturally growing forms.

Pocket-size and waterproof, Wildflowers of the Southern Rocky Mountains hosts a plethora of spectacular and diverse native flower species for you to easily identify in this lush alpine region.

A fact-filled, pocket-size identification guide to the Golden State's serpent species, Snakes of Southern California is an excellent resource for all outdoor and nature enthusiasts

Describing 45 native species, many of which are found throughout the California coastal region, Trees of the San Francisco Bay Area is a handy, pocket-size guide that makes tree identification easy.

Learn to recognize a variety of Lone Star State arachnids with Spiders of Texas, a colorful, waterproof guide. It is an excellent resource for identifying 100 spider species found in the area.

A fact-filled, pocket-size identification guide to the serpent species of the Lone Star State, Snakes of Southeast Texas is an excellent resource for all outdoor and nature enthusiasts.

Follow the tracks, scats and signs of wild mammals in Kansas, Oklahoma and Nebraska with Mammals of the Great Plains, a waterproof, pocket-size guide to help you identify what roams in the region.

Filled with 92 colorful photos of native wildflowers of the Lone Star State, the waterproof, pocket-size Wildflowers of Central Texas is an essential field guide to learn what grows, when and where.

Descend on the desert in spring and take in the beauty of the colorful wildflowers in bloom with Wildflowers of Central and Southern Utah as your handy, waterproof guide to reference in the field.

Get to know the native tree species that give Texas Hill Country and the surrounding areas their unique character in Trees of Central Texas, a handy, pocket-size guide with over 250 illustrations.

Host to a plethora of annual and perennial native wildflowers spanning 10 counties, Wildflowers of the San Francisco Bay Area is the perfect flower-lover's guide to identify blooms all around the bay.

Get to know the native tree species that give Houston and the surrounding areas their unique character in Trees of Southeast Texas, a handy, pocket-size guide with over 250 detailed illustrations.

Featuring full color photos and descriptions of 41 of the most common herps in the area, Reptiles and Amphibians of the Mojave Desert is a handy, pocket-size guide for this region of the Southwest.

Waterproof and pocket-size, Wildflowers of Southeast Arizona helps you identify an abundance of wildflowers growing across rugged mountain ranges and lush valley grasslands of the fertile region.

If you're birdwatching in the Cotton State, Birds of Alabama Field Guide allows you to easily identify 140 species common to the region with facts and full-color photos, all organized by color.

Explore and identify the colorful abundance of common native wildflower and shrub species from Kern to Plumas County with the waterproof, pocket-size Wildflowers of the Sierra Nevada field guide.

This colorful, waterproof guide—Saltwater Fishes of Northern California—will help you identify 63 saltwater fish found from the northern border of California near Crescent City down to Monterey Bay.

Raptors of Western North America contains more than 120 color photos of all the raptors that occur west of the Rocky Mountains in the continental United States and Canadian provinces.