I stopped by the artificial den on the way to work today. The snakes were just waking up. One yawned a couple of times and that got everyone else yawning. Sadly, my camera is very slow to focus in low light so I only caught one of them.
The guy with his head tilted up in the next photo was getting ready to yawn, but he faked me out. I focused on him when I saw he was getting ready, waited… and waited… and finally turned my camera on someone else and THEN he gave a big adorable yawn. I think he was messing with me…