In a flurry of post-war productivity, Niko Tinbergen re-established his lab in Leiden, wrote landmark papers and his famous book The Study of Instinct, and founded the journal Behaviour to serve the burgeoning field of ethology. Tinbergen and his senior assistant, Jan van Iersel, published their classic paper, "Displacement reactions in the three-spined stickleback," in the first issue of his new journal in 1948. Stickleback are now a powerful model in the fields of behavioural ecology, evolutionary biology, developmental genetics, and ecotoxicology - an extraordinary development for a small...