This brings back memories from childhood. My dad was with the county agriculture department and was once given the responsibility of poisoning pest pigeons at the railway station in a nearby town. Should not have been a big problem, right? Put out the poison bait in such a way that only the pigeons would be affected.
Then the train came through. (You will have to imagine the sound of the train whistle here. I tried to put a train whistle here, but I got in trouble and was banned from the free sound effects page, so obviously I didn't do it right.)
Thousands of pigeons, startled by the train whistle took off from the station platform...
...and dropped dead all over town.
It wasn't something we talked about a lot.