Whether it is hatchlings or eggs that overwinter, young first appear in the spring following the year of egg deposition. Individuals grow slowly in the wild, and their age at their first reproduction may be 10 to 12 years in the northern part of the range.
The timing of young emergence is dependent on whether hatchlings or eggs overwinter, and they grow slowly in the wild before reaching reproductive maturity at around 10 to 12 years old in the northern part of their range.