Birds have respiratory systems built for flight, which means they extract oxygen from air far more efficiently than we do. The same efficiency applies to anything else in the air.
That is why things that are harmless to you can kill a bird in minutes, and why bird-proofing a house is mostly about air rather than about what is within reach.
The kitchen, which is the dangerous room
Non-stick cookware
This is the one that kills birds every year in homes where nothing looked wrong. Overheated non-stick coating, generally above 500F or 260C, gives off fumes that are invisible and have no smell. They cause the lungs to haemorrhage, and death is fast.
There is no safe distance and no amount of opening a window that makes it acceptable. The only reliable approach is to remove it entirely: no non-stick pans, no non-stick baking trays, and no self-cleaning oven cycle, which reaches those temperatures deliberately. Stainless steel, cast iron and ceramic instead.
Worth knowing that the same coating turns up on things people do not think of, including some air fryers, toasters, hair straighteners and space heaters.
Foods
- Avocado, which contains persin and is toxic to the heart.
- Chocolate, for the theobromine.
- Caffeine in any form.
- Onion and garlic, which damage red blood cells.
Birds out of the cage help themselves from plates, so this is about what is left on the counter as much as what is offered.
Everything airborne
- Aerosols. Hairspray, deodorant, air freshener, furniture polish, cleaning sprays. Severe respiratory irritation at best.
- Scented products. Candles, plug-in fresheners, essential oil diffusers and incense all release compounds that damage avian lungs. Essential oils in particular are widely assumed to be natural and therefore safe, and they are neither for birds.
- Cleaning products. Bleach, ammonia, oven cleaner and floor polish can chemically burn the respiratory tract. Use bird-safe cleaners, ventilate hard, and move the bird to another room while you work.
- Smoke of any kind, including vaping. Chronic respiratory disease, and nicotine residue on hands transfers to feathers and feet.
Heavy metals
Birds investigate with their beaks, and it takes very little metal to poison one.
- Lead: old paint, stained glass solder, curtain weights, fishing weights, cheap costume jewellery.
- Zinc: galvanised wire, and the nuts, bolts and quick links on cages and toys, which is the source people never suspect because it came with the cage.
- Signs include lethargy, vomiting, increased thirst and seizures.
Suspected ingestion is an emergency. Ring an avian vet the same hour, because heavy metal poisoning is treatable early and often not later.
The rest of the house
- Houseplants. Dieffenbachia, philodendron, lilies and poinsettia among many others. Check every plant in the room and move anything doubtful rather than relying on the bird not being interested.
- Medication. Paracetamol, ibuprofen and most human medicines are severely toxic. Store them shut away, not on a bedside table.
- Water and heat. Open toilets, full sinks and pans on the hob. A free-flying bird lands on things, and both drowning and scalding happen this way.
The habit worth building
Before you spray, light, heat or open anything, ask where the bird is. Most of these accidents happen during an ordinary routine that had never been a problem before.
And if a bird is ever found breathing oddly, sitting fluffed at the bottom of the cage, or open-mouthed after any fumes, get it into fresh air and to an avian vet immediately. Birds decline extremely fast, and waiting to see how it looks in the morning is usually too long.
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