I've bred those guys for over a decade. It's hard to sex them, and you have to do it in breeding season,(now) by siting down in a chair and watching them atfer introducing them into a small tank, with little or no substrate. I breed them in 3 gallon tanks, with only a quarter inch of sand.
Males will fight almost to the death doing barrel rolls and leg and body biting. Legs can be broken and it ain't pretty.
Females will also fight violently but not quite as badly as males.
When pairs are together the male will chase the female, occasionally nip at the tail and back legs but will tend to go for the neck area much more, eventually biting the neck then climbing on top. Females that are being courted by males, eventually stop running. This is not the case with 2 of the same sex.
In addition to the above "in situ" sexing technique, females have slightly longer bodies and frequently have more narrow heads and are wider apart across the back legs, but this is pretty subtle.
Females that have been with males, will have bite marks on the neck. Check for that. Males do not bite each other's necks, but focus on mid body, back legs and tails are frequently removed.
Neck bite marks occur during copulations between pairs only and specimens with such neck marks are surely females.
If you have two of the same sex, the bites will be lower, mid body and tail.
I can't guarantee it but looking at your pics, the first one looks like a male and the lower pic looks female.
They're great little skinks.. I have raised numerous generations of them, with a pure diet of fancy feast cat food.
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Uncle Roy
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Herpetology - more than a hobby
It's a Lifestyle
celebrating 26 years of herp breeding
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