Parthenogenesis is a scientific term for a virgin birth that takes place in species that usually reproduce sexually.
Female aphids don't need males to reproduce. Their trick is called "parthenogenesis" and means big savings in time and energy.
In 2001 a shark was born at a zoo in Nebraska. The birth might not have been newsworthy, except that baby appeared in a tank with three female sharks.
In fact, one of the defense mechanisms of these insects, crypsis, involves their taking their resemblance to twigs as far as it will go.