First of all, I have two RES hatchlings in a tank that is rapidly getting too small form them (I have plans to upgrade soon), and one of my RES's is doing something odd. I have several large rocks in the tank (one of my hatchlings is smaller than the other and needs a little extra help getting to the surface than the larger one does) and one of the rocks leans against the side of the tank. My larger RES (Yugioh) has taken to leaning next to the rock, in almost exactly the same angle, with his(?) head and front legs tucked into the shell as his hind legs help him maintain the posture. He'll stay like that for a long time, and he repeatedly resumes the posture during the day (during the night he and the other turtle like to sleep under the basking lamp, each one with its head tucked into the other's forelegs). The little one (Sakura) isn't doing this, and I've never had turtles before. Is this normal? Should I be concerned? (Oh, and he's taken to squeaking when the birds chirp, and I don't know if that's normal either.) Advice, help, ideas, or (best of all, but I don't feel lucky) reassurances would be nice.