Well an update; I managed to locate another one. This time a little girl. In the shop she was on the "land" in my tank she's went for the land; although she is hidden in a cave on land - however the cave has a little water in the bottom of it.
She seems a little smaller than the other one so I think she may be younger; I'll keep a close eye on them for the next couple of days.
Isaac (first newt) is still happily stomping around the bottom of his tank.
how i tell if mine is male or female? i heard something about the tail.
the only "real" differences are:
1, a "bump", on the male, where the tail meets the abdomen. (underside). sexual maturity, has a large effect on how obvious this is.
2, Females, providing they are well fed and healthy, are larger, possibly, more rounded.
the sexing of "japanese Firebellys", though, exhibit, similar traits. to the above. but, males have longer toes. and during the breeding season, exhibit colour change. grey/blue. specifically, on the tail.