Animals

Harvesting Ants and Trap-Door Spiders

Report on the Migration of Birds in the Spring and Autumn of 1880

The Wanderings of an Elephant Hunter

A Hermit's Wild Friends; or, Eighteen Years in the Woods

Bee-Keeping

Birds and their nests

The Migration of North American Birds

The Lone Swallows

Krag and Johnny Bear

Field, Forest and Farm

The prey of the strongest

The Book of the Ocean

Fifty Years a Hunter and Trapper

Wild Life in Southern Seas

Life Among the Butterflies

Friends and Foes in the Australian Bush

The Ornithosauria

Natural History of the Ground Squirrels of California

Natural History: Fishes

A Short History of the Academy of Natural Sciences of Philadelphia