One-year-old Lasai came to the San Diego Zoo from the Basel Zoo in Switzerland in 1963. With his arrival, the Zoo’s collection could boast black, white, and greater one-horned rhinoceros species. Each was housed in newly constructed, moated exhibit areas on the large mammal mesa. A volume of correspondence reflected efforts to obtain a mate for him before Jaypuri, a young female born in India’s Kaziranga National Park, joined Lasai in 1965. Transferred to the fledgling Wild Animal Park in 1972, breeding hopes ran high for the pair.