What is the max. age of a ratsnake still breeding?

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: Hi everyone : I have done some thoughts about the period of time in which it is possible to breed a ratsnake. : I have had Elaphe situla for many years and they seem to produce fewer and fewer fertile eggs after the female has reached an age of about 10 years. The oldest breeding situla female, I have had was 17 years. Males seems to be able to breed throughout their whole life. : My Elaphe mandarina has bred (and is gravid now)since 1991, and she was an adult wild caught entering Europe in 81. She must be more than 25 years old. She is also producing fewer and fewer eggs and the fertility rate is declining. : It could be interesting to hear if anyone has any experience to share on this subject. : Best wishes : Søe

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