Reptile & Amphibian Forums

I bought a tailless created with a pretty big bulge, but not much cleavage, so I'm thinking female. She is 7 mos. Any hints in how to tell the gender on a tailless?

the bulge is pretty much unmistakable in adult males. if its an adult, and it has a bulge at the base of the tail (or where the tail should be), with or without this 'cleavage' you talk about, should be male. females will be lacking the bulge completely.

Actually, according to the book "Crested Geckos in Captivity" by Robbie Hamper there is a bulge in both genders, but the males bulge is larger. Anthony, do you know how to tell on a tailless gecko? the skin is being pulled unusually upwards, which might make it look more bulgy than if it grew gradually over the tail. The 2 are together now and are getting along well (they licked each other and went on their ways). If they were both males wouldn't they be aggressive?

At 7 months old, I can't tell you that a male's bulge would be completely developed, as I don't know how big the gecko is.

On a mature male, the bulge will protrude as shown in the attached photo, however, at 7 months old, if the gecko isn't 18-20 grams, it may not be fully developed.

As for agression between males, that's not always the case...especially in virgin males. I've kept three virgin males in the same cage and never observed any agression.

Your best bet is to post a photo of your gecko that shows the vent area.

www.ACReptiles.com

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Anthony Caponetto
www.ACreptiles.com