“Mating in insects is facilitated by simple cues and signals. In many insects, including ants, the stimuli that induce males to attempt mating with a female are largely chemical … Technically, this queen is not yet fully dead, and the chemical signals she emanates are undoubtedly still strong.”

In this video, a Prenolepis nitens queen is shown being consumed by a crab spider while male ants, in a reproductive frenzy most likely motivated by the pheromones being released as she dies, and despite its futility, repeatedly mate with her. 

(Source: livescience.com)

At dawn in the spring, the males of the Black Grouse (Tetrao tetrix), a large bird found across Europe which belongs to the grouse family, engage in a lek - a courtship behavior that consists of displaying the distinctive white feathers of their tail while strutting and making a mating call. 

Hedgehog Mating Rituals - David Attenborough (Life of Mammals - BBC)

Ulrich Haacker’s original giant pill millipede videos (source). 

Green Porno - Why Vagina?

Seduce Me - Deer

Wonders of the African Bull Frog - Battle of the Animal Sexes - BBC Wildlife

Mate selection: How animals fight disease - Battle of the Animal 

Size is Everything: Bull Elephant Seals - Battle of the Animal Sexes - BBC

Bush Crickets - Battle of the Animal Sexes - BBC