Deathwatch beetles start their life as a pupa emerging from an egg and eat wood for 10 to 15 years, at the end of which they emerge as an adult beetle. At this point, they are blind and have less than a week to find a mate and have sex. So the male starts banging his head against the wood and hopes for a female to answer his calls. If he is lucky and finds a female, there are chances that she may reject him.
22Crab Hacker Barnacle
Crab hacker barnacle is a species of barnacle that is a parasite found in crabs. The female will attack a crab, movie inside it, push out a sac that contains its eggs. It then controls the mind of the crab into caring for its egg sack as its own, and when the time comes the crab shoots them out through pulses creating a large cloud of parasites.
The ophiocordyceps unilateralis is a parasitical fungus that infects and exerts mind-control over certain species of ants. It will hijack an ant’s central nervous system and force the ant to climb a stalk of vegetation and anchor itself. The fungus then sprouts a stalk from the ant’s head, releasing spores that infect ants below. It can destroy entire ant colonies. In response, ants have evolved the ability to sense that a member of the colony is infected. Healthy ants will then carry the dying one far away from the colony in order to avoid the fungal spore exposure.
A giraffe starts its life by falling 2 meters (6ft) to the ground. Because they need to get blood to their brains through their long neck, they have a huge heart. Consequently, their blood pressure is extremely high, the highest of any animal on the planet at 280/180 and their heart rate rests at about 170bpm. The Humr people of Sudan consume a hallucinogenic drink; which is created from the liver and marrow of giraffes.
Bedbugs reproduce via a process known as “traumatic insemination” where the male pierces the abdomen of a female with his lance-like penis and injects his seed into the wound.
The duck-billed platypus has a gene mix of birds, reptiles, and mammals and genetically has 25 possible sexes. The Platypus is one of the few mammals that lay eggs. They lactate but have no nipples, hunt via electricity, and their venom has 80 different kinds of toxins.
Despite being commonly referred to as "mosquito eaters" and resembling giant mosquitos, adult crane flies are anatomically incapable of harming the insect. In fact, their lifespans are so short (less than a week) they typically don't eat anything at all.
The tapir is a large, herbivorous mammal which looks similar to a pig. They are so well endowed that they can step on their penises while mating and trip as a result.
The tripod fish walks around the bottom of the ocean floor on their three fins looking for a partner to reproduce with. If they can't find a partner, which is almost always as the ocean floor is giant and completely dark, they reproduce with themselves as they are hermaphrodites.
30New Mexico Whiptail
The New Mexico whiptail is a female-male only lizard that reproduces asexually via parthenogenesis (eggs don't need to be fertilized). Despite reproducing asexually, and being an all-female species, the whiptail still engages in mating behavior with other females of its own species, giving rise to the common nickname “lesbian lizards.”