We've got gangs of marauding house sparrows in the back garden. I do like the birds, but there must be a good 50 or so nesting nearby. Got a couple of feeders out, so they are constant visitors, and I think out compete a lot of the other small birds. We'd occasionally get a couple of blue tits, but not much else. After a year of feeding, we've now got a couple of great tits and a pair of coal tits that visit. The bluebirds have been visiting regularly, and a bit of excitement when I spotted a goldfinch. The highlight has been a pair of nesting robbins that look like they've set up shop in our hedge. But between the sparrows, pigeons and jackdaws a lot of the smaller birds don't get much of a look in!