I have a bird problem in my attic. Little birds who nest in bunches of 20-30 peck holes in the siding and get in. Killed one two years ago with a BB gun and they quit drilling holes until about a month ago. Trying to kill one now but they're very small, very fast and fairly smart. When I step out of the garage their buddies in the trees warn them.
Don’t do what I tried! I put a five pound bag of cayenne pepper into a shop vac and reversed the hoses to blow it out in reverse. I caused a cloud out of my attic for about two square blocks. There were neighbors crying and coughing and gagging everywhere. The squirrels it left laughing, enjoying their spicy nuts and seeds.