Spotted hyaena Crocula cracuta demography was studied in Etosha National Park, South West Africa/Namibia. In central and eastern Etosha, spotted hyaenas were most abundant in areas occupied by the migratory plains ungulates, eg. zebras Equus burchelli, springbok Antidorcas marsupiaIis, wildebeest Connochaetes taurinus. Hyaena density (5 adults and subadults/100 km2) estimated in a portion of the migratory plains ungulate range was low compared with densities reported from most other conservation areas. Keywords: Denning behaviour, Dens, Density, Distribution, Immobilization, Land tenure system, Marked hyaenas, Night-tracking, Population management, Predators, Radio-colIared, Scavengers, Temporally variable environment, within-season fluctuations.