Chocolate, caffeine, avocado are toxic to parrots. Teflon is usually in non stick pans but can also be in hairdryers, space heaters, popcorn makers. Ceramic and steel pans are usually safe. I always check to see the product say no ptfe included.
loose string can cause a bird to hang themselves and cotton rope can be swallowed and cause crop impactation.
controversial foods that I do not give my birds are onions, mushrooms, celery, white potato, white rice, white bread, chips, any junk food, spinach (high in oxalates), asparagus, any fruits seed pits, (kiwi and strawberry are safe), romaine lettuce (just due to so many lettuce recalls), peanuts (low chance of aspergillosis).
costume jewelry allowed to be licked (or any metals) can cause metal toxicity. Paint licked or eaten can be toxic. (Power coated cages are safe)
Then there’s the usual cover all mirrors and windows (curtains) so the bird doesn’t accidently fly into them. Turn off all unsafe fans and ceiling fans when the bird is out. Don’t let them out while cooking. Keep the toilet seat lid down. Don’t let the bird directly under the shower head (water pressure can cause too much water in nose). If you shower with your pet, let the water spray off your body onto them, or just spray them with a mist from a water bottle, above their head so water falls on them.
Have an extra door if possible in the porch (or screen door), secure screen windows when open.
Don’t let predators like cats and dogs unsupervised with your parrot.
these are the only dangers I can think of at the moment .
It's bird mutation genetics 101
