Le Jour des fourmis (English: The Day of the Ants) is a 1992 science fiction novel by French writer Bernard Werber.

[citation needed] 17 people, including several relatives of Edmond Wells, the pioneer of the deceased inter-species communication, are still trapped under an ant nest.

A wolf-fearing police detective and a human-fearing woman, Edmond Wells's daughter, combine their knowledge in order to find out who or what is behind these murders.

One of the central themes of the novel is that humans can learn a lot from the civilisation of the ants and vice versa.

In one chapter of Edmond Wells' Encyclopaedia of relative and absolute knowledge, the protagonist is asked about the best way to get rid of ants in one's apartment.