Heyer, W. Ronald and Morato de Carvalho, Celso. 2000. "Calls and calling behaviour of the frog Leptodactylus natalensis (Amphibia: Anura: Leptodactylidae)." Proceedings of the Biological Society of ...

Drewry, George E., Heyer, W. Ronald, and Rand, Austin Stanley. 1982. "A functional analysis of the complex call of the frog Physalaemus pustulosus." Copeia, (3) 636 ...

(CNN) -- As Kermit the Frog once said, "It's not easy being green." Of course, what Kermit meant was that it's not easy to be different. But he might have also been referring to the plight of his ...

Scientists discovered that a tiny Panamanian bat hunts like a lion, catching large prey using sound, patience, and precision.