http://www.freesound.org/people/calodas/sounds/188376/
http://soundbible.com/1336-Frog-Croaking.html
http://www.freesound.org/people/Jace/sounds/155312/


http://freesound.org/people/ayamahambho/sounds/116400/
http://www.freesound.org/people/Benboncan/sounds/58277/
http://www.freesound.org/people/NoiseCollector/sounds/4914/
http://freesound.org/people/foxen10/sounds/149024/
http://www.freesound.org/people/dobroide/sounds/95817/
http://www.freesound.org/people/vataaa/sounds/148873/
http://www.freesound.org/people/Erdie/sounds/44271/
http://www.freesound.org/people/reinsamba/sounds/57794/
http://www.freesound.org/people/mrbubble110/sounds/70333/