Pygmy hippopotamuses are endangered, semi-aquatic, largely nocturnal mammals of West African forests whose welfare in captivity requires deep pools, forest-like habitat design, and respect for their solitary and crepuscular nature.
Pygmy hippo welfare in captivity is substantially dependent on appropriate environmental design. These are animals whose natural rhythm is nocturnal, whose social system is solitary, and whose habitat is dense forest near water — a very different profile from the common hippo. Facilities that house pygmy hippos as diurnal, social display animals violate core aspects of their natural behaviour. High-welfare management provides deep water access at all times, shaded forest-like land areas, privacy from excessive visitor interaction, and feeding schedules that match their naturally crepuscular activity pattern. Where possible, pairs should be managed with adequate space to allow voluntary separation, as forced cohabitation causes stress in a fundamentally solitary species.