When I was a kid there was an injured bird in the backyard that was dying. Parents said to leave it alone and let nature take its course. Checked on it a while later and it was covered in ants while still breathing.
Yikes! Fwiw, we left it outside in the woods. Went back to check to see if it was still there and it was gone. I'm sure a fox or hawk got a hold of it. I'm just relieved I didn't have to see THAT. Oof.