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
Animal Life and Intelligence
by C. Lloyd (Conwy Lloyd) Morgan
Intelligence in Plants and Animals Being a New Edition of the Author's Privately Issued "Soul and Immortality."
by Thomas G. (Thomas George) Gentry
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