Hippopotamuses face increasing pressure from habitat loss, drought, and human conflict along African river systems, with welfare consequences including territorial crowding and resource competition.
Hippo welfare is primarily threatened by habitat compression. As rivers shrink during drought or are modified by dams, hippos are forced into smaller and smaller water bodies where territorial males engage in increasingly frequent and violent conflict. Wounds from territorial fights cause deep lacerations that can become infected in polluted water. Night grazing is progressively restricted by agricultural expansion that has converted riverside floodplains to farmland, forcing hippos into conflict with farmers and sometimes crop raiding that provokes retaliatory killing. The combination of reduced water, reduced grazing, and increased territorial density creates chronic welfare stress for a species with very specific habitat requirements.