Environmental Protection

Wild and Wonderful

Mammals of the San Gabriel Mountains of California

The Whelps of the Wolf

A Bird-Lover in the West

Watched by Wild Animals

The Rocky Mountain Wonderland

Bears I Have Met—and Others

The Silent Places

Roof and Meadow

The New 50 Simple Things Kids Can Do to Save the Earth

I Walked in Arden

The Crest of the Continent: A Summer's Ramble in the Rocky Mountains and Beyond

In the Open: Intimate Studies and Appreciations of Nature

Canadian Wilds

Cruise of the Revenue-Steamer Corwin in Alaska and the N.W. Arctic Ocean in 1881: Botanical Notes

Bird Stories from Burroughs

The Country Beyond

The Gamekeeper at Home

Creatures of the Night: A Book of Wild Life in Western Britain

Prose Idylls, New and Old