Both of my new Knights are females, I think. I have a long term captive that I purchased in '97 that I KNOW is a female (laying eggs is is the give away!!!) in the same enclosure as my two new ones and their is no courting behavior or aggression what so ever. As far as age, it's hard to tell, since my two new ones were certainly wild caught. I'd say no more than about 8 months.
