Decoy switches frogs’ mating call preference
Third option alters choice of previous alternatives
![frog](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/08/082615_ss_frogstory_free.jpg?fit=860%2C460&ssl=1)
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