Parthenogenesis has been known in reptiles, mostly smaller lizards and snakes for some time now. Whiptail Lizards (in the link) have long be known to have a female-only population though so these snakes certainly aren't the only 'wild' examples.
Edit:// Wait, the thing then contradicts itself and says it's known in loads of species. Neverminddd!
@Scarf - Yes, asexual reproduction leads to very genetically similar populations. If a new disease comes along/the environment changes suddenly then those populations reproducing by parthenogenesis will be unlikely to have the diversity to survive.
Just a note, although they are asexual offspring there will be slight genetic differences due to random mutations.
I believe the difference is that it was observed in captive animals before it was documented in the wild.