I think it is one of the chats. It would be very useful to understand where this was taken in Namibia.
The rump is reddish and the tail appears to have paler edges, at least to the top half. Both of these rule out Chat Flycatcher. Also there should be paler fringes to the secondaries, although...
1.All appear to be Cape Cormorant, the commonest species on the coast. Both Bank and Crested Cormorant also occur but are much scarcer. Also a Cape form of Kelp Gull hiding at the back.
2.White-breasted Cormorant (P (c) lucidus) - this is not split by Clements and there it remains a subspecies...
You can attach jpegs but this works. I was in Etosha in October.
1. Scaly feathered Finch
2. Definitely a Sparrow-lark, probably Grey-backed
3. Pale Chanting Goshawk
4. Black-winged Kite
5. Sabota Lark
6. Grey-backed Sparrow-Lark - male
7. Grey-backed Sparrow-Lark
8. Grey-backed Sparrow-Lark