https://freesound.org/people/Rock%20Savage/sounds/81042/ (CC) 
http://www.audiyou.de/beitrag/sheep-schafe-in-der-antarktis-1756.html (CC) 

http://www.audiyou.de/beitrag/der-chor-eines-wolfsrudels-3893.html (CC) 
https://www.freesound.org/people/BrainClaim/sounds/267179/ (CC)



 