Sparrows are getting even with me

Last week was at one of my permissions blasting starlings and sparrows. When I got back to my truck I was startled by a sparrow inside of my truck. I had left the windows cracked. I thought it flew out. Fast forward to yesterday and I open my truck door and am hit by this awful smell. Start looking around and there it is laying dead under the passenger seat. Still stinks today, so might have to have it detailed. I guess they are getting even with me for shooting their relatives.