Found in northeastern Argentina, the Aplastodiscus perviridis frog has an elaborate mating behavior, as AMNH and Brazilian herpetologists recently discovered. The male burrows into the muddy banks of streams, creating a private hideaway into which he guides his mate. After they breed, the secret basin becomes a nursery for developing tadpole larvae, which are only later carried into the stream by flash floods; the tadpoles then finish developing into frogs in the flowing water.