Ground Cuckoo-shrikes on the Tanami Road

Drove out to Papunya today via the Tanami Road. I stopped at an area where someone had told me they had seen a Grey Falcon in a tree over a period of years. I noted that there was a fair bit of nest building that had taken place since I was last there, but no sign of any Grey Falcons. Will continue to check on this site each time I pass. I ventured further up the road a bit and 3 birds flew from my right across the road and landed on my left on some scrubby-covered ground. I stopped the car and grabbed the camera, wondering if I was just chasing a group of Magpie Larks, although they had a different flight pattern to the M-Ls.
I have seen Ground Cuckoo-shrikes previously, but never really managed decent photos. Once I looked through the camera and realised my hunch was correct, I snapped off around ten photos, but from a decent distance and realised later the wire fence in between was beautifully in focus, the birds a lovely grey, white and black blur in the background. There was a bush between me and the birds so I crouched and hurried up behind the bush. In the meantime, they had fluttered a further 20 metres away from me. Below is a sample of what I managed to capture:

Ground Cuckoo-shrike