Virgin Births May Be Common in the Wild

       This Article is about wild animals having virgin births. It is quite common for animals to have asexual reproduction with invertebrates, or animals without backbones. Scientist has only seen this happen in captivity not in the wild which makes this very rare with Pit Viper snakes. Genetic analysis reveals examples of this virgin birth with both the copperhead and cottonmouth. They found there was no genetic contribution from the father. 

http://www.foxnews.com/science/2012/09/15/virgin-births-may-be-common-in-wild/

http://www.biotopics.co.uk/genes1/asexual_and_sexual_reproduction.html