We have them all Sam. We have shrubs outside the kitchen window that are full of sparrow, I'd say about 50+ We live in the sticks adjacent to another cottage. Next door feed all the birds, of which there are hundreds. We have a murder of crows in the trees at the bottom of the garden that attack both our two cats and the two cats next door. Hence, all the cats leave the birds alone, they are scared of them, the crows made sure of that. The only time we lost a yellowhammer was to a Rat!. I'm pleased to say that family have now departed.