Ecology

Mammals of Northwestern South Dakota

Flashlights on Nature

Bombay Ducks

Colin Clout's Calendar: The Record of a Summer, April-October

Last Leaves from Dunk Island

Literary Pilgrimages of a Naturalist

Field, Forest and Farm

The Climate Change Hoax: The Global Warming Deception

The Art of Migration

The South Country

The Manatitlans or, A record of recent scientific explorations in the Andean La Plata, S. A

In the Dwellings of the Wilderness

Subspeciation in the Meadow Mouse, Microtus pennsylvanicus, in Wyoming, Colorado, and Adjacent Areas

The Life of the Fly; With Which are Interspersed Some Chapters of Autobiography

The life story of a squirrel

Lyrics of Earth

The Myxomycetes of the Miami Valley, Ohio

The Voyage of the Beagle

Excursions

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