There are many kinds of sparrows, but the one people usually refer to as a pest is the Eurasian House Sparrow. Can be found on 6 continents, reproduces quickly, and are gregarious (most other sparrows don't live in groups).
I find their antics to be interesting, but they're aggressive to other birds, especially for nesting sites (and they'll nest anywhere, unlike many of the birds they compete with).
I find their antics to be interesting, but they're aggressive to other birds, especially for nesting sites (and they'll nest anywhere, unlike many of the birds they compete with).