"Importance of animal aesthetics and its understanding to human aesthetics has been largely ignored, despite its significance to Darwin.... Darwin suggested the aesthetic possibilities of odors, songs, “antics”, especially ornaments of [such as] the most brilliant tints, combs and wattles, beautiful plumes, elongated feathers, top-knots and so forth."
January 1, 1970
https://en.wikiquote.org/wiki/Aesthetics