If you are thinking of serving up some wild rook stew in your restaurant then you might find this article interesting. It lays out the rules and regulations which apply to killing and eating wild birds in the UK. The article which appears to have been written after a restaurant was asked to stop selling rook salad looks at the regulations. All wild birds are protected by the Wildlife and Countryside Act of 1981. Despite this it is legal to eat some species if they are killed under licence but they can not be sold for human consumption. It is, however, legal to eat a wild bird if it has been killed by someone else or it has been discovered dead as road kill. There are also some birds which are protected and for which no licence to kill can be granted such as golden eagles, red kites and woodlarks. So presumably if I come across a pheasant that I want to eat I need to try and run it down with my car.