Animal intelligence — Audiobooks
Animal Intelligence The International Scientific Series, Vol. XLIV.
by George John Romanes
Ways of Nature
by John Burroughs
Animal Behaviour
by C. Lloyd (Conwy Lloyd) Morgan
Lola : or, The thought and speech of animals
by Henny Kindermann
The Mental Life of Monkeys and Apes: A Study of Ideational Behavior
by Robert Mearns Yerkes
Intelligence in Plants and Animals Being a New Edition of the Author's Privately Issued "Soul and Immortality."
by Thomas G. (Thomas George) Gentry
Animal Life and Intelligence
by C. Lloyd (Conwy Lloyd) Morgan
Clever Hans (The Horse of Mr. Von Osten) A contribution to experimental animal and human psychology
by Oskar Pfungst
Animal intelligence: Experimental studies
by Edward L. (Edward Lee) Thorndike
The intelligence of invertebrate animals
by Maynard Shipley