Snakes are male-female animals that generally grow and develop until they reach sexual maturity in three years. In terms of external appearance, there is no big difference between the two sexes. Generally, male snakes have larger heads and longer tails that gradually taper. Female snakes have relatively smaller heads, thicker tails and suddenly taper backwards. Snakes come into estrus and mate in spring or autumn and are seasonal animals in estrus. The estrus and mate periods vary depending on the species of snake. During the growth period, a male snake can mate with several female snakes, but the female snake only mates once, and after mating, the sperm in the female snake's cloaca can maintain fertilization ability for 3 years.
Snakes generally lay eggs from late June to late September, with one clutch per year.
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