If you look at page 221 of the Sibley Field Guide Zenaida macroura is what I see 10 feet from me in the back yard.
The birds are in their winter plumage, which is more of a slate grey. The spots are there on the tail.
They and other birds go through about 200 pounds of bird seed each winter. Or 4 to 5 of Costco's 40 pound bird seed packages.
Additionally, hummingbirds go through about 10 pounds of sugar each winter (1/4 cu to 1 cup of water).