More To Grass Than Meets The Eye
Gene Logsdon, The Contrary Farmer
You can tell that the photo above is not a lawn because of the glob of sheep manure in the center. Unfortunately most people do not graze farm animals on their lawns. What you are looking at is mostly bluegrass and white clover, two plants that grow wild all over the United States... No plant “invasion” could be any more beneficial.

(original)