My wife recently visited a friend on a 30 acre cattle ranch in southeast Texas. (south of Houston) She asked about these birds that were around the cattle. The friend's husband said that they were cowbirds and that they stayed with the cows all the time and fed on flies. He never had a fly or pinkeye problem. Was he kidding her? I did a google search and did not find much other than cowbirds lays their eggs in other bird's nest and feed on insect in the summer and grain in the winter. What is the real poop on cowbirds?