Environmental Protection

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

Lyrics of Earth

Mooswa & Others of the Boundaries

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

Modern Whaling & Bear-Hunting

Islands and Communities

Cottontail Rabbits in Relation to Trees and Farm Crops

Nature Near London

The Extermination of the American Bison