Feeding behaviour of the black rhinoceros (Diceros bicornis) in Great Fish River Reserve, South Africa

afrique du sud animal introduction animal population browse plants comportement alimentaire conservation de la nature ecologia ecologie ecology encuestas endangered species euphorbia feeding habits introduction d'animaux nature conservation nature reserves plantas de ramoneo plante d'abroutissement population animale reservas naturales rhinoceroses rinoceronte south africa surveys veld woodlands