Of all my tetrads covered for the Bird Atlas, the most sparrow-rich has been TQ81Q at Fairlight Cove, which resembles Pat’s area at Camber in that it is a seaside bungalow development though on a cliff-top rather than sand. The gardens there are pretty manicured but many householders put out feeders and there is access to rough grass on the cliff-edge. On my early winter visit I found 76 birds, which had the website sending a flashing red warning that the count was unusually high.
Another good flock is to be found around the entrance to Toot Rock, Pett Level where they exploit a chicken run and up to 60 birds are present in late summer. Around our house at Chick Hill I see breeding adults foraging, as Brian notes, for insects in pasture well-manured by cattle. I share his views on their conservatism in visiting new feeding sites even at a very short distance from an existing one.
House Sparrows are not that easy to count; not only do they squabble inside dense shrubs as Pat notes, but also chirrup invisibly from eaves and gutters. Around Alexandra Park, Hastings, you can hear them calling from nearby streets but they don’t seem to cross to the park itself. In the Weald they are often either absent from human habitation or hanging on in isolated pairs and seem most to favour untidy farms with livestock. In N Spain, though, I’ve noticed they occupy any building, even vacant second homes way out in the woods, with not a chicken in sight.