(A) The two neighbors never fought each other .
(B) Fights involving three male fiddler crabs have been recorded, but the status of participants was unknown.
(C) They pushed or grappled only the intruded.
(D) We recorded 17 cases in which a resident that was fighting an intruder was joined by an immediate neighbor, an ally.
(E) We therefore tracked 268 intruder males until we saw fighting a resident male.