Depends on the type of bird, type of road, etc. A big ass goose could have just tumbled under the car. I tiny bird could have been smashed and flattened, and vice versa, etc... I certainly wouldn't stop on the freeway. A flying goose once lightly bounced off the moving van I was driving on the highway some long time, I looked in the mirror, it kept flying and I didn't stop.
How many umbrellas do you have?