Originally Posted by
privet01
The chirping might be a stray cricket. However if you could also consider it a croak or a barking sound then it's one or both of you FBT's and that would suggest one or both are male.
When you find one on the back of another, that may be posturing by the dominant male to restate his place in the "world". It's normal, so to is the aggression to an underling anytime they do anything the dominant one finds threatening to his status. It's all harmless and it's very unlikely to ever cause injury to either. Even if one is held underwater by the other for long periods, it's okay.
FBT's are going to do this. If you don't like it, then you'll have to have separate viv's for each <grin>.