What is the difference between sparrows and gray birds

Sparrows and gray birds are two completely different birds. The former belongs to the genus of Cultural Birds, and the latter belongs to the genus of the family.And their appearance is different. Although the size is similar, the color of the former is mostly brown, and there are gray -black spots on their bodies. The back of the latter is cyan -gray, the abdomen is gray, and the head is black.In addition, the distribution of the two is also different. The former is mostly a gathering place for humans, while the latter is in the forest.