Hi all~
Many thanks for all the kind replies. I found Azuli at about 4:00 in the morning when I had completely given up for the night. I'd just gone out into the living room to turn out the lights when I saw her come out from under the futon. She saw me and whipped right around and flew back across the room, but I caught her in a corner. It was so late I just went straight to bed, and this morning I woke up very late for work. My apologies for not writing an update sooner I am so relieved.
I have no clue as to where she could have been, we took every inch of this apartment apart. Including removing the futon mattress, all books from every shelf, looking in all shoes, under every appliance, and putting anything that she could get into (including the ferret cage) on top of the futon once we were sure she wasn't there. Sneaky little thing, but she is now safely back in her tank and about to get a nice meal of minnows. My apartment is a bit of a disaster, but that's ok
Angela
P.S. There were some really good suggestions there, maybe we should make a list to put under care sheets? I never would have thought of the flour, that's very clever. I had planned to make a basking spot with a bowl of fish, but it really wouldn't have occurred to me to put a hide next to it. Duh....