These snakes are small and poisonous, and live in Canada and the Northwestern United States. Their highly unusual mating takes place during an enormous orgy. Hundreds snakes slither together in a large den, eager to copulate. In that pile, one female may have as many as 100 males vying for her.
Argonauts exhibit extreme sexual dimorphism in size and lifespan. Females grow up to 10 cm and make shells up to 30 cm, while males rarely surpass 2 cm. The males only mate once in their short lifetime.
The whiptail lizard is an all-female species. It reproduces through a method called parthenogenesis. Each Whiptail lizard has an ovarian cycle of 21 to 28 days. When two are placed in a cage together, they synchronize their cycles so they are opposite.
The Anglerfish has one of the most unique mating methods. When a male is born, it has no digestive system so it needs to find a female (all of which do have digestive systems) quickly.
Bedbugs mate by “traumatic insemination” – what this means is that the male doesn’t even bother with the female sexual organs – it simply stabs the female with its own sword like sexual organ in any part of her body.
Giant Pandas are famously difficult to get to mate in captivity – at least until some bright spark in China discovered that showing them panda porn seems to help increase their libido
The star fish in Finding Nemo is a clownfish. What most people don’t know, is that Nemo was neither a boy nor a girl – s/he was both! Clownfish can change gender!
Female giraffes associate in groups of a dozen or so members, occasionally including a few younger males. Males tend to live in “bachelor” herds, with older males often leading solitary lives. Reproduction is polygamous, with a few older males impregnating all the fertile females in a herd.
Female porcupines are only interested in sex for 8-12 hours per year. Interested males will stand on their hind legs and spray a female with urine. If she is ready and interested, she will expose her quill-less belly to the male and they will mate until they are both exhausted
Unlike most other hyenas, the female spotted hyena has a pseudo-penis (enlarged clitoris). Female hyenas give birth, copulate, and urinate through their protruding genitalia, which stretches to allow the male penis to enter for copulation, and it also stretches during birth