Environmental Protection

Where Men No More May Reap or Sow

Runaway Planet

Wakulla

In the Open: Intimate Studies and Appreciations of Nature

Supplement to Animal Sanctuaries in Labrador

Wild Folk

Our Common Land (and Other Short Essays)

Nature's Teachings: Human Invention Anticipated by Nature

The Rocky Mountain Wonderland

A Bird-Lover in the West

The Gamekeeper at Home

The Grizzly, Our Greatest Wild Animal

A Northern Countryside

The Flower-Fields of Alpine Switzerland: An Appreciation and a Plea

World's End

Bird Stories from Burroughs

Wanderings in South America

The House of the Trees & Other Poems

The Fall of the Year

An Experimental Translocation of the Eastern Timber Wolf