Titania definitely lives in a cave, I've wanted to design it for a while but haven't quite got it looking right yet. so she lives in a cave but caves are prime real estate in the dino world so she has to defend her turf from rivals but I imagine other dino's may live in huts or some form of tents for shelter. since dinos are so huge I image most house concepts wouldn't work for them or be a luxury so for the big girls like Peral a kind of tent or lean to shelter might be good enough to get them out of the rain and sun.