This is getting more interesting by the minute..... we've just looked at the books again and there are a huge amount of colour variations even in the different books........I've only ever seen fairly light coloured burchell's, but they're obviously not all the same colour..... all that said, my money is still on a francolin of some kind and probably the Orange River francolin, simply because of it's behaviour. From my experience, all the sandgrouse family get up and fly very quickly when disturbed and the francolin only fly as a last resort.... but I'll look forward to hearing Karl's comments on whether they behave in the same way in Namibia.