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 ...

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.

The dam that forms Varsity Lake on the University of Colorado campus is solid, but nevertheless riddled with crevices that provide safe havens for western terrestrial garter snakes, Thamnophis elegans ...