Put this butt in your nest

Some birds put cigarette butts in their nests. Maybe they want a smell of home or maybe it has become instinctive so quickly. Either way the butts keep down the parasite levels and help the birds to thrive.

The idea is a fake cigarette butt. It would look like the normal kind but being exclusively made for this purpose it wouldn't end up looking ugly, that being the only real reason people don't like them. These would be orange but would have no color fixative and no other toxic elements except nicotine. They would be made biodegradable and made to fall apart after one or two rains. Something like unbleached toilet paper on the inside and beta carotene on the outside. They could be placed outside in bins for birds to pick up for their nests alongside bird seed.