Last week, I was at my old university. 4 men were shooting pigeons with air rifle. They collected the dead bodies in a black plastic bag. I went to be a busy body, and asked if they did it often.
No, only when the authorities call us, when the pigeons become a pest.
It reminded me of a story when I was in Canada. We were staying in an apartment. An idiotic gun crazy friend bought an air rifle and started shooting at the pigeons on the roof. The pigeons die on the roof and leave a terrible stink.
We threatened to report him to the police if he didn't stop.