La simulación en la lucha por la vida

The Expression of the Emotions in Man and Animals

The Dawn of Reason; or, Mental Traits in the Lower Animals

Zoölogische Philosophie Of beschouwingen over de Natuurlijke Historie der dieren etc.

Clever Hans (The Horse of Mr. Von Osten) A contribution to experimental animal and human psychology

Spiritualism and the New Psychology An Explanation of Spiritualist Phenomena and Beliefs in Terms of Modern Knowledge

Animal Life and Intelligence

Ants and Some Other Insects: An Inquiry Into the Psychic Powers of These Animals

Intelligence in Plants and Animals Being a New Edition of the Author's Privately Issued "Soul and Immortality."

Animal intelligence: Experimental studies

Straußenpolitik