Scientists suggest female frogs listen for changes in the male calls as a signal for when it's warm enough to mate.

Male green treefrogs attract mates with loud calls, but new research shows parasites can subtly change those signals.

Every other Friday, the Outside/In team here at NHPR answers listener questions about the natural world. Today's question comes from Andy, calling from Dover, New Hampshire. Alejandro Vélez: That is a ...