When the vultures appeared at the scene they were constantly moving and interacting. They were thinking about posing for the photographers so when an opportunity to get a portrait shot of one of the griffon vultures appeared you hade to be quick. Just a second later it was back in the crowd fighting for the food.
A black kite taking a short pause from the feast in front of the photo hide.
The griffon vulture looks up from the food for a moment before the head disappears again. The vultures lacks table manners, looking away for too long and you risk being left without food.