What is copulation?

Some articles on copulation:

Canine Reproduction - Copulation
... media related to Dogs mating As with most tetrapods, canine copulation involves the male mounting the female from behind, a position informally referred to as "doggy ... penis commonly becomes erect before entering the female, canine copulation involves the male first penetrating the female, after which swelling of the penis to erection occurs ... During copulation, and only after the male's penis is fully inside the female's vagina, the bulbus glandis becomes engorged with blood ...
Spermophagia - Physiological Aspects - Internal and External Fertilization
... Internal fertilization takes place after insemination of a female by a male through copulation ... (amphibians, reptiles, birds and monotreme mammals), copulation is achieved through the physical mating of the cloaca of the male and female ... In marsupial and placental mammals, copulation occurs through the vagina ...
Milax Gagates - Ecology
... In Britain copulation takes place during the period from spring to autumn ... During copulation both slugs cling together so closely that no everted genitalia are visible ... conditions, the first eggs are laid 5–15 days after copulation ...
Tubifex - Copulation and Cocoon Formation
... Two mature Tubifex worms undergo copulation by joining their ventral and anterior surfaces together with their anterior ends pointing opposite ... After copulation, they separate and begin to produce egg cases containing eggs, called cocoons ...
Sexual Cannibalism - Costs and Benefits For Males - Genital Mutilation
... describes males with partially or fully mutilated pedipalps resulting from copulation with a female ... Argiope arantia, have been found to spontaneously die within fifteen minutes of their second copulation with a female ... with the female, as well as still swollen from copulation ...