It is largely vagrant to Namibia, with a maximum of 31 birds seen at Lake Oponono in March 1999 and 58 birds at Middelbult Dam, near the Waterberg Plateau National Park, in April 1993. Other similar concentrations are known from Namibia's north-eastern rivers. The maximum (non-resident) number of birds in Namibia is estimated at fewer than 200 birds, with birds generally present after summer rains and absent by winter. Namibia's population contributes less than 1% to the world population, which is estimated at 25,000 birds.