Sparrows are one of the most common birds seen throughout the world. Because of that, and because sometimes they can be actual pests when they eat seed crops, they are not usually held in high regard.
Since I’ve been photographing birds, I have noticed subtle differences between various species of sparrows, especially when I look at the captured images blown-up on a big screen monitor. Following are some of them, taken over the past three years.
Note that juncos and some finches may also belong to species related to sparrows.