I did the same in my bathroom.
Put a bag over them when parked.
LOL! We have Pilate woodpeckers in our area, lots of them and they can get very loud with their pecking. They’ve pecked on our gutters, on the transformer at the pole, on my radio tower but so far haven’t bothered our vehicles. When this first started happening I did a little research and yep, it’s mating season...the louder the pecker the more chance of mating. One year we had one constantly pecking on the radio tower for about a week straight, it was hysterical, we figured he was really desperate, teeheehee.