I think you're right, Val, that is is a sound they make when they are wanting something. I swear I could see the longing in Lan's eyes when he saw his kids and then made that sound.

I had a big old male glider that would cry whenever I trimmed his nails.

Silly monkeys, aren't they? Well, Elfie didn't cry last night, at all. Until last night, she was in a relatively small cage while I worked with her. Yesterday, she moved into her larger one and was so happy, bouncing everywhere that I think she forgot she's in heat!

:) nice to hear good stories. Kiwi also only cried for one night as usual. I'm glad Elfie's happy with her larger place! It's true that the more room they have the happier they are. When my three girls first got their own room (gliderproofed and full of toys and branches, of course) they started waking up about two hours earlier every night just to play more.