Tungara male frogs that inhabit urban environments are more attractive to females than those that inhabit forests, due to their greater complexity. It has been released in the journal Nature Ecology & Evolution.
Researchers recorded wild frogs and civic korrokas around the Panama Canal. They observed that citizens were more complex and they did it more often. To some extent, they consider that this difference may be due to the fact that there are fewer predators in the city. The engraved corks were placed to the females, and they saw that they attract more the corks of the citizens.