Probably very curious and most likely trying to decide if the leopard gecko is food. Definitely a good idea not to put htem into contact with eachother. It wouldn't take long for a blue tongue to seriously hurt a leopard gecko....Blue tongues can be very social with humans but they don't particularly like other lizards...including other BTS's...which does make pairing them to breed tricky.

As they are not the easiest lizards to sex, especially when babies, its very easy to end up with two of the same sex when trying to breed. I had bought two from separate bloodlines when I bought them from a breeder, and she gave it her best shot on selecting a male and female pair...I lucked out with two males. I only knew for certain they were both males after they were fully mature and I found sperm plugs in their cages. Fortunately it was before I was going to take a chance and put them together to see if I did end up with a sexual pair. Males will attack eachother quite vigorously if put together...a male/female pair will cause the male to freeze so he gets a chance to check out the other's scent to determine if its a male or female. Two females tend to ignore each other...but if in the same cage they can be very territorial. Either way, I am glad I found sperm plugs in both their cages...not sure how fast they would have reacted to eachother if I put them out on the floor and supervised, to see what happened.
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PHLdyPayne

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