I don't have any adult female E. jaculus to know their size, but I think (Scott M. ??) they get bigger than that. Knowing that it is 20.5" without growth for ~2yrs, I would say that it is E. miliaris.
Neat looking individual! The head looks similar to my E. miliaris' heads, but the pattern and color looks different.
Hopefully a couple others with chime in...
-Chris
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Christopher E. Smith
Contact
Captive Bred Herps
Wildlife Research & Consulting Services, LLC

