It's hard to say how often this happens in the wild since we do not have a good way of monitoring wild animals 24/7. In captivity, we know it is occurring more than we had previously thought.
Here is a list of some of the more memorable virgin births in recent years:
1 - Axolotls - These amphibious wonders also known as the Mexican walking fish not only can regenerate their organs but they defy nature's rules on a regular basis and reproduce without a partner.
2 - Gray's leaf bug - Infamous for looking just like a leaf these bugs also participate in virgin births on a regular basis. If the females decide that they don't want to deal with the opposite gender they don't have to, they will reproduce all on their own. If a male fertilizes the eggs, it only takes three to four months to hatch. If they are unfertilized, they take six months to hatch.
3 - Thelma - A 20 foot reticulated python who resides at the Louisville Zoo shocked the world when she laid 60 eggs. Thelma had never been kept in an enclosure with a male before. Of those 60 eggs, only six hatched.
4- Turkeys - Christmas has been slowly stealing Thanksgiving's thunder for some time. Apparently, Thanksgiving has decided that it has had enough. Our favorite Thanksgiving bird has decided to move in on a part of Christmas' thing. Virgin birth. Female turkeys have been laying eggs that are hatching into healthy chicks. Strangely all of the baby turkeys that result from a virgin birth are male.
5 - Leonie - This 20-year-old Leopard shark made international headlines when she gave birth to three offspring. Since there was no male involved her offspring are essentially three clones of herself.
The one thing these virgin births prove is more we learn about nature the more we realize we don't actually know.