Environmental Protection

Our Common Land (and Other Short Essays)

Nature's Teachings: Human Invention Anticipated by Nature

The Rocky Mountain Wonderland

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

The Child's Book of Nature

Wanderings in South America

The New North

The House of the Trees & Other Poems

My Year In A Log Cabin

On Naval Timber and Arboriculture

The Fall of the Year

Views of Nature – Contemplations on the Sublime Phenomena of Creation with Scientific Illustrations

An Experimental Translocation of the Eastern Timber Wolf