Try pitching down a Komodo dragon.
http://www.hark.com/clips/pjxshzhnnh-komodo-dragon
http://www.audiomicro.com/reptiles-reptile-komodo-dragon-sound-effects-171352
I think that your nearest ones are in LA Zoo.
2 of 3
added 110 characters in body; added 81 characters in body
user80