Ecology

Cornell Nature-Study Leaflets

Food of the Crow, Corvus brachyrhynchos Brehm, in South-central Kansas

The new northland

Watersprings

An essay towards a natural history of serpents

Water Survival Skills

Shelter Building Basics

Arqtiq: A Study of the Marvels at the North Pole

A Guide to Natural Bridges National Monument, Utah

Big Bend National Park, Texas

Perambulations of a Bee and a Butterfly

Extinction Race

Natural Treasures

Wildlife Rescue Action

Urban Bee Guides

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

In African Forest and Jungle

A Year in the Fields

The Jenolan Caves: An Excursion in Australian Wonderland

A Trip to Pilawin, the Deer-park of Count Joseph Potocki in Volhynia, Russia