There are many surprising things that are not safe for budgerigars or parrots in general. Here is a list of common everyday foods, pet toys, and environmental factors that are not good for your budgie!
Environment
Even if your budgie isn't free-flying it's important to know what things aren't safe to have in your home and in the air with your bird's delicate lungs.
Metal birds toys are regularly galvanised with zinc to stop rusting. Electro-galvanised zinc is safe – the surface will look shiny.
If the surface is more dull, it's likely been hot-dipped in zinc, which that can flake off and poison your bird.
Lead
It's less likely to come across nowadays, but lead can still sometimes be found in bells and bell clappers. If it can be easily bent it is probably lead.
Rusted iron
Any metal toys with rust are toxic.
Moving parts
Be cautious that the moving toy parts cannot accidentally trap the budgie. Things like spring-loaded fasteners, snap hooks (like on a dog's leash) and key-ring rings.
Small hoops, including chain links
A hoop that is too small could trap a budgie head, foot, beak, toe, or tongue. Bigger is better.
Some woods
Not all woods are safe to make perches and toys from.
Budgie World has a comprehensive list of woods and other plants that are toxic to budgies, and those that are safe.