I heard this call in River Drive Westville KZN in 2002 and went looking.
And I found a new bird to add to the long list in our first home: An Olive Bush Shrike!
This year on the other river in Westville, the Palmiet, I heard the call again and got that ‘I know what that is, but I can’t put my finger on it’ feeling. So I recorded it and posted it to the Friends of Pigeon Valley whatsapp group. Jonathan Hemson came back promptly with the answer. A new addition to the list in Elston Place.