I have no doubts at all about the sexes. The male is easily 12 inches, the females 8 or so. He has a much broader head, as well as a larger base to the tail and distinct femoral pores. I have been keeping reptiles for 15 years, worked in stores for 6, I have astrong knowledge in care and all. I just can't seem to get them to breed. Of my 42 reptiles, the tokays are the only ones I want to breed, and thats just so I can have a tame one. I thank you both for the help, and you have sparked some more questions, such as should change temp or humidity to induce breeding, has that ever seemed to help? Also I know they dont use a humid area to lay eggs, but would a humid hide help? I dont have pics at this time, but the cage has a large cat litter pan for water, and quite a few branches for climbing, even though they are only ever on the glass and behind the water pan. thanks again, and let me know anything else that you can.