The most common way people accidentally kill a pet bird is in the kitchen

If you have a bird and nonstick cookware in the same house, this is the one to read. Birds don't breathe the way we do. They have air sacs running through the body in addition to lungs, and air moves through the system in one direction, which makes their gas exchange incredibly efficient. Great for flying at altitude. It also means anything airborne hits them far harder and far faster than it hits you. Overheated PTFE, the coating on traditional nonstick pans and what people mean when they say Teflon, gives off fumes you won't smell or feel at all. Birds die from it in minutes, often with no warning signs first. The breakdown happens at high heat, roughly above 500 F, which an empty pan preheating on a burner hits very easily. It's not just pans, and this is the part that gets people who already threw out the pans. The same or similar coatings turn up on self cleaning oven interiors during the clean cycle, on some space heaters, irons and ironing board covers, hair dryers, air fryers, waffle irons, drip pans, and heat lamps. The self cleaning oven cycle has killed a lot of birds specifically because nobody connects the two. The fix is removal, not ventilation. Get PTFE cookware out of the house and use stainless, cast iron or ceramic. If for some reason you can't, the bird goes in a different room behind a closed door with a window open, and you never run a self cleaning cycle with a bird in the home at all. Since you're auditing anyway: avocado, chocolate, caffeine, alcohol, salt and onion are all toxic to birds. So are aerosol sprays, scented candles, plug in air fresheners, and smoke of any kind. Birds and plug in air fresheners do not mix.