Ecology

Conversations with Nature

Canyons of the Colorado

In the Dwellings of the Wilderness

Nature Mysticism

Craters of the Moon

Wake-Robin

The Land's End: A Naturalist's Impressions In West Cornwall, Illustrated

The Eagle's Nest

Our Common Insects

Bramble-Bees and Others

Essays of a Biologist

Gairloch in North-West Ross-Shire

Notes of a naturalist in South America

Out of Doors—California and Oregon

Nature's Serial Story

The Isles of Sunset

Antarctic Penguins: A Study of Their Social Habits

The Mammals of Warren Woods, Berrien County, Michigan

The Common Objects of the Country

The Twelve Months of the Year, with a Picture for each Month