I emptied an old terracotta pot the other day, and there was a mahoosive slug hiding in the bottom of it (as well as numerous other small ones. The big one got chopped in half with my weeding knife. I left the others in the plant pot and went off to do some digging on the other side of the garden. When I came back, all of the slugs had gone, the sparrows and blackbirds had got a bit of protien in their diet! Strangely enough they were patrolling the bit I'd dug as well for the worms.
The male blackbird who's resident in the rowan tree with is missus makes me laugh. When the weather was really bad, not only did I put a suet block in the hanging feeder, I put one on the bird table, too, so he could have some. He was very funny chasing the sparrows away from HIS dinner, and even had a go at the starlings (until joined by their mates). He tells me off regularly when I'm pottering about on the patio.
As for slugs, the frogs the next-door neighbour raises in his pond (he's got an allotment and as a good Yorkshireman doesn't like spending hard earned brass on fancy slug deterrents when they can be a dinner for something useful), we get a couple of escapees in our garden that tend to see off the smaller slugs. As I'm going to be doing veg this year out of necessity, I think the nematodes will be the way to go. Both the nemaslug and the nemasys grow-your-own, as well as the slug-gone pellets around the brassicas. I really don't like eating anything that's been home to creepy-crawlies, so keeping them off my veggies is a priority.