Recently, I was shooting a construction site near downtown when I heard really loud chirping emanating from a tree in a busy parking lot. So many house sparrows were tucked inside, hiding on the branches, the tree was actually shaking! It took awhile, but I managed to get this shot (above)...of what I believe to be a female house sparrow. And also this photo...
...which I believe is a male house sparrow. (Apparently, he was going out on a limb to see what I was doing.) I was staring at that tree for probably 20-25 minutes in a fast food parking lot, and believe it or not, not a single person inquired what I was looking at. They all just walked and drove by, oblivious to nature's abundance in that tree.