Just a cursory google for Teflon killing birds yields numerous results including this one … from teflon.com - https://www.teflon.com/en/consumers/teflon-coating

Just a cursory google for Teflon killing birds yields numerous results including this one … from teflon.com - https://www.teflon.com/en/consumers/teflon-coatings-cookware-bakeware/safety/bird-safety https://www.teflon.com/en/consumers/teflon-coatings-cookware... When the product itself is actually publicly fessing up to being acutely toxic in some way, it’s a pretty safe bet it is. There’s no reason to doubt the account here of the birds dying and this being the likely cause.