Scinax tropicalia
Scientists heard this frog make three kinds of sounds: When the male frog sings for the female frog, he sings one short note.  When male frogs see each other, they make other kinds of sounds.  A frog may make a short squeak if another male frog comes too close.  He may squeak if a male frog tries to mate with him.  A male frog may make a long noise if another male tries to push him off a female.