Is the sparrow harm or bird?

The sparrow was considered a bird in the past because it would eat grains, but it was later considered a bird, because in addition to eating grains, it would also capture the pests of the scales -winged -wing -winged period, which was helpful for agricultural production.However, the breeding ability of this bird is very strong and the number is more, so it is easy to form a bird's harm in the harvest period.At present, it cannot be simply defined as a bird or a bird.