This is pretty much what
you hear during mating season.
Frogs are most noticeable through their call, which can be widely
heard during the mating season.
Not exact matches
If you're in the right place at the right time, you'll even
hear their
mating call; a loud grunt can be
heard during or after they have lifted a particularly heavy set of weights.
If you fancy playing with a
mate then RAGE is coming packaged with a series of co-op missions which are all based on stories you
hear about
during the singleplayer story.