Greedy birds

These wood pigeons laugh at me everyday. They wait for me to fill up my bird table and then fly down, eat like mad, make a mess, eat like mad, laugh at me, eat like mad and when thay are full they fly back up into next door's tree to continue to spy on the next filling up of the bird table.
The little garden birds that I want to encourage are not brave or big enough to take them on. I have warned the pigeons today that it is WAR!