Thank you all.
I have rechecked and Daniel you are correct about the Collared Palm Thrush distribution I saw it was a few miles south of Victoria Falls. I thought I had maintained the locations carefully but had made an error - my apologies.
What an amazing resource this forum is - I should have found it earlier.
As a newbie here I wonder if anybody can help me identify these birds I photographed in Southern Africa in Aug/Sep 2018.
The first image was taken at Etosha NP Namibia (close to a waterhole), the second and third were...