As many as 5% of some species born to virgin mothers?

[Mike41793]

As far as the rattlesnake part: do they realize that sperm can be retained? So how do they know that didnt happen and it just so happened the female only gave birth (hatched) to one male? Im not really sure how she would have had a male without any dna from a male.

EDIT: nm, i think i may have read that weird...