Caterpillars of North America

Pocket Nature: Flower Finding

Trees

Owls of the World

National Audubon Society Wildflowers of North America

National Audubon Society Mushrooms of North America

Trees of Illinois Field Guide

Mariposas Nocturnas

How to Forage for Mushrooms Without Dying

Kaufman Field Guide To Birds Of North America

Reading the Forested Landscape

A Naturalist's Book of Wildflowers

The Sibley Guide to Birds, Second Edition

Birds Of Prey

Peterson First Guide To Birds Of North America

National Audubon Society Birds of North America

Kaufman Field Guide To Nature Of The Midwest

A Peterson Field Guide To Warblers Of North America

Peterson Field Guide To Birds Of North America, Second Edition

Peterson Field Guide To Birds Of Eastern & Central North America, Seventh Ed.

Birds of the Upper Mississippi River & Driftless Area

The Backyard Birdwatcher's Bible

The Field Guide to Dumb Birds of America

A Photographic Guide to North American Raptors

Peterson First Guide To Butterflies And Moths