birds

i saw a large group of birds on my way to indianapolis in when i went there weeks ago.. they were so many that for a while the sky darkened when they passed overhead.. i thought they must be flying south for the winter.. i tried to capture the sight but itts not good anymore by the time i got the camera out.. there is a particular type of tree here in downtown springfield that birds like to perch on.. lots of droppings on the ground is the proof.. one time as i was passing under it one of them pooped on my jacket.. it was a big one.. bad bird