Nature

Stars of the Desert

From North Pole to Equator: Studies of Wild Life and Scenes in Many Lands

The Stewardship of the Soil

The Face of the Fields

New Rivers of the North: The Yarn of Two Amateur Explorers

Elementary Botany

John Kerry's testimony before the Senate Foreign Relations Committee

Devils Tower National Monument

Birds of Song and Story

Two Ways of Becoming a Hunter

Four-Footed Americans and Their Kin

Tales of a Vanishing River

Mushroom and Toadstools

At the Sign of the Fox

Letters to a Friend, Written to Mrs. Ezra S. Carr, 1866–1879

Eighth State of the Union Address

Angelfish

Llamas and Alpacas

The Lizard Keeper's Handbook

Green Anoles