Surveys show that the Patrysberg section of the Namibian coast is exceptionally important for Ruddy Turnstones and seasonally supports at peak 1.4 % of the estimated Siberia-sub-Saharan Africa flyway population. They also show that published generalisations about the time of arrival and departure of Ruddy Turnstones mask considerable inter-annual variations, which can largely be attributed to conditions on the breeding grounds. They also suggest that the Ruddy Turnstones that occur in Namibia during the non-breeding season might come from two geographically distinct breeding populations. Keywords: Namibia, Ruddy Turnstone Arenaria interpres, arrival, departure.