For the first time, the Smithsonian’s National Zoo and Conservation Biology Institute (NZCBI) is celebrating the birth of two pygmy slow lorises, an endangered species. Small Mammal House keepers reported for duty the morning of March 21 and observed that 3-year-old mother Naga had given birth overnight and was caring for two infants. She and the babies’ 2-year-old father, Pabu, received a recommendation to breed from the Association of Zoos and Aquariums’ Species Survival Plan (SSP). These babies are the first offspring for both parents. Keepers have observed Naga carrying, grooming and nursing the babies, which appear to be healthy and strong. Animal care staff will determine the babies’ sexes at their first vet exam, which will take place in a few months. The family is on view at the Small Mammal House, and keepers say the babies are most active in the late morning and early afternoon.Naga and Pabu arrived at NZCBI in August 2022 from the Brookfield Zoo in Illinois and Little Rock Zoo in Arkansas, respectively. SSP scientists determine which animals to breed by considering their genetic makeup, health and temperament, among other factors. According to keepers, Naga’s personality is calm and sweet, though she tends to spook easily. She takes her time when exploring her exhibit and rests often. Pabu, on the other hand, seems to be more high energy. He is inquisitive and always the first to approach keepers and participate in training sessions and feedings. Although pygmy slow lorises reach sexual maturity around 9 months of age for females and 1.5 years of age for males, often they do not successfully reproduce until 2 to 3 years of age. Naga and Pabu’s “howdy” introductions took place in September 2023—about a year after they arrived—and the pair bred soon after meeting. This species’ gestation is about six months.
