Francois langurs were another new species brought to the San Diego Zoo as a result of the growing relationship between San Diego and colleagues in Chinese zoos and the Ministry of the Environment in China. Four of these little-known primates, rarely seen outside of Asia, arrived at the Zoo in October 1981. During the routine arrival exam, veterinarians found that the adult female was pregnant, and in January 1981, the Zoo not only had another rare monkey species for visitors to see but also a brand-new baby—and a redhead, at that! It was interesting for guests to learn that in some monkey species, the offspring are a different color than the adults to stand out among the troop, and it was interesting for the Zoo staff to observe and record the progress of the pregnancy and the maternal behavior of their new resident.