Cannibalism in animals
In zoology, cannibalism is where an animal eats its own species. It has been recorded for more than 1500 species  It is quite common with insects, spiders and scorpions. There, the male gets eaten by the female, after having sexual intercourse.
- G. A. Polis, The evolution and dynamics of intraspecific predation. Annual Review of Ecology and Systematics 12, 225-251 (1981).