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... for a bit, spent some time looking for a chat-like bird with yellow bill before I realised it has something in it.
I've already identified it as this species - with a different English name - ie mocking chat
Please note that there is a South African iSpot at http://za.ispot.org.uk where you are likely to get faster and more accurate identification of local species.
Lat/Lng: -29.6, 30.3