Besides avocados and oleander, which 'foods/products' are toxic to birds?

For example, I drop a piece of toast and go scatter it to the birds in the garden. What if it's buttered or has peanut butter on it. Can this harm them? Do they glean, naturally, what is toxic to them?

Besides avocados and oleander, which 'foods/products' are toxic to birds?
Cleaning products are bad for birds, like Febreeze and Arm and Hammer.





I'll give you the website where you can find foods and products that are bad for birds.
Reply:It is my understanding that native birds know what is harmful and what is not-- recently, I learned that some foods they eat which was bad for a certain group of parrots that they are able to eat the clay because they have such a fast digestive tract that it isn't in their bodies long enough for their bodies to absorb it.





They like peanut butter-- my children put peanut butter on pine cones and dipped it in birdseed and hung it outside and watched the birds come and eat it.





Keep feeding the birds-- chocolate is bad but who is going to share that w/ the birds!! right ?
Reply:Butter is too fatty for them but peanut butter in very small amounts is ok. Chocolate, alcohol, salty, fatty, and greasy foods should not be fed to birds.