Yet that negligible amount is enough to kill birds. What was that about miners and canaries?
No it's not. You misunderstood what you read.
To kill birds you have to burn the Teflon, and the Teflon smoke kills them. And you have the get the pan HOT - way hotter than anyone cooks. Teflon is not easy to burn, you can put a blowtorch on it for a short time and not affect it.