Hi Sue

I don`t know. The idea that there could be a relation between temperature and sex ratio on some snakes came many many years ago. A friend bred Lampropeltis getulus california "Desert face" and many of them...........all males. He gave up the species after some years and about 200 males and 3 (yes only 3 females)He always incubated the eggs at a fairly high temperature. I cannot remember how high, but I think, it was more than 30*C

Since I am breeding a lot of different animals, I also have many incubators on various temperatures, and I always experiment to find the temperature, where the animals are strongest, best eaters and even sex ratio or more females.
I incubate at lower temperatures than most people here. Usually I keep the ratsnake eggs at 26,3*C, which I have found to be the best one for me on most species. But some species gives me a challenge like some dione and situla. I have bred situla since 1981 and in so many generations, that I cannot remember how many, and they still gives me far more males than females. I had the same problem with coxi, but when I lowered the temperature to 25*C and with a night cooling, I started to get more females.
I don`t keep those any more, but I got even sex ratio in the end.

Right now there are about 70 ratsnake babies. All except a very small dione ( a twin ) are eating after their first shed. That is a very good thing that saves a lot of time.

This is just my experiences, nothing else. I keep trying

Best wishes
Søe

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