Thanks for the reply! I only have one WTF right now, I've had him for about a month, but I'm not sure how old he is exactly. I assume it's a male because of the loose skin around the neck, and I've heard him make a few abrupt sounds that are similiar to the recordings I've downloaded. You're probably right that interaction with females could help stimulate his call, I'll try looking for one.
Which actually leads me to another question, I havn't seen any adults (WTF) at my local petshops lately. However, there were some baby WTF's (about an inch long) that were for sale. I wouldn't house these little guys with my voracious adult, but how long would it take for these babies to reach adulthood? Also, is there care alot more difficult than adults?
Thanks,
Sean