Birds - Territorial ??
Are Birds such as the Tit family, Finches, Robins and Sparrows territorial.
As I have a feeder at the rear of my house in a tree and the nieghbour has one in her front tree.
But it seems the Sparrows go to the front with the Robins and the Tits go to mine with Finches and Robins also Woodpecker etc.
Also although I use 'Peckish Wild Bird' feed, alot is wasted. As it seems none of the birds like the barley size seeds unless I leave them for the Wood Pigeons. I have a large planter saucer suspended by hanging basket chains to collect the waste rather than go on the lawn, which is where the pigeons get their share.