This is waterbird country. Expect regular kingfisher action (Pied and Giant), plus herons and egrets hunting the shallows. When the dam’s spillway is flowing in wet years, fishing birds often stack up at the overflow. Comb Duck and, with luck, Thick-billed Cuckoo have been noted here.
Raptors patrol the S39 corridor: look for Martial, Tawny, Wahlberg’s and Lesser Spotted Eagles, with Bateleur common in surrounding woodlands. African Fish-Eagle is a good bet around nearby waterholes. Mammal surprises happen too—elephants occasionally wander through.