Tringa glareola
This is a particularly common summer migrant, which can be seen throughout South Africa. The prominent spots on its back together with its yellow legs and prominent supercilium (extending beyond the eye) distinguish it from other medium sized sandpipers.
Excellent spots to photograph this species include Mkhombo Dam Nature Reserve in Mpumulanga, Marievale Bird Sanctuary near Nigel and around the Sappi bird hide in Stanger, KwaZulu Natal.