Pecking into the wet sand and almost every time pulling out a mole crab. Most of them were immediately discarded, but if the crab was a roe-bearing female the raven would bite off the abdomen + eggs and gulp it. Video here: https://youtu.be/pI5mbiCj4Bs

The video shows a few females eaten this way, but doesn't show the raven's overall remarkable rate of crab-getting success. When I was first watching it it would stab into the sand every couple of seconds and get a crab each time, littering the sand around itself with discarded crabs.