Although Snapping Turtles may mate any time between April and November, much breeding activity takes place during April and May. Snapping Turtle mating appears fairly aggressive, with the male chasing the female, grasping the posterior end of her carapace and then mounting her. He holds on to the edges of her shell with all four legs, often biting her head and neck while he inseminates her.
The female Snapping Turtle can keep sperm viable in her body for several months (and perhaps years). Thus, there can be multiple paternity in egg clutches and it may even be possible that a female’s eggs are fertilized in years when she does not mate. (Thanks to Jim Block for photo. To see a photo series of Snapping Turtles mating (and many other very fine nature photographs), go to http://www.jimblockphoto.com/2010/04/snapping-turtles/)
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