Female Tail Rattling

[Golden Gate Geckos]

Sorry, but it sounds like one of the geckos is a male. Tail 'rattling' is a typical male breeding response. Tail 'waiving' is a typical defensive threat.

My guess its that you have a male and a female.

 

[catvettech]

Nope, Hannah is not a male. These two gals just don't like one another. They both bite at one another and lock up with bites to the face.