Forty-eight adult and 17 immature male lined snakes (Tropidoclonion lineatum) were collected in St. Louis, Missouri, during the active seasons of 1978-1980. Testis mass was lowest in early spring and ...

Most snakes lay eggs as part of the reproductive cycle. Because of this, it is interesting when a snake gives live birth. One species that does is the Dumeril’s boa. These boas are ovoviviparous, ...

For years scientists have known that some species of sharks, fish and lizards are capable of "virgin births," asexual reproduction known as parthenogenesis that occurs when unfertilized eggs develop.