Animal sex pheromones evolve rapidly and predictably

Lizards develop a more attractive smell when competition is high and the chance of predation low.

Relocated in small groups to experimental islands, lizards rapidly and repeatedly developed new chemical signals for communicating with each other. Free from the risk of predators and intent to attract potential mates, male lizards produce a novel chemical calling card, according to new research from an international team of biologists published April 21 in the Journal of Animal Ecology.


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