Decoy switches frogs’ mating call preference

Third option alters choice of previous alternatives

frog

CALLING CARD  Male túngara frogs like this one attract their mates with a series of chirpy croaks. When picking between two calls, females tend to prefer a lower tone and more quickly repeated calls, but adding in a third suitor with an unattractive song may change a female’s preference between the two other males.  

A.M. Lea

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