This is something I have read about and now seen with my own eyes for the first time. I often put a slice of bread in one of the fat ball feeders near the bottom of the garden. The Rooks always arrive early in the morning and having the bread to go at keeps them away from the other feeders.
This morning, as usual, they spotted me in the kitchen and flew to a nearby tree. One had a large piece of bread in its beak. Another Rook landed on the same branch and leaned towards the first with wide open beak. After a few attempts at begging it was rewarded. The first Rook gave some of its bread to the second.
They were both adults as would be expected in the Winter. Of course I started up the video camera which is always ready on a short tripod on the work surface near the window but I was spotted and they all flew away. I can but hope that another opportunity arises to film this activity which may be part of the social group bonding or part of the mating ritual as occurs with Robins.
Squeaking them in......
22 minutes ago