Légende :
Nikolaas Tinbergen, A male Stickleback Lacking a Red Underside (N) and Crude Models of Male Sticklebacks with Red Undersides (R) (1951)
Drawing from Nikolaas Tinbergen, The Study of Instinct, Oxford: Oxford University Press, 1951
Contenu associé : “Je ne sçai quoi”
