Sexual behavior of 1 male and 3 female Hokkaido brown bears in captivity was observed 62 days from May 1 to July 1, 1984 at Maruyama Zoo. Copulation took place in the following sequence: mounting, pelvic thrusting, quivering and dismounting. The average copulation time was 23 minutes. Mating was observed from early May to late June. All of three females were not mounted consecutively during a 20-day mating period.
