Photograph of three male zebra finches (Taeniopygia castanotis), whose mating calls were used as part of the study. Credit: Raina Fan. The bright colors of butterfly wings, the sweet aromas of flowers ...
From the eerie croak of a tropical frog to the haunting call of the howler monkey, the animal kingdom is filled with some wild and wacky mating calls. But which do you find the most appealing?