It’s generally regarded as a fact that birds have very sensitive respiratory systems, far moreso than humans. Much of this comes from the proven sensitivity of birds to smoking Teflon products.
When heated to temperatures above 260C (500F), this otherwise stable material emits several flourinated prolysis products that are known to be rapidly lethal to birds.The Avian Respiratory System: A Unique Model for Studies of Respiratory Toxicosis and for Monitoring Air Quality—Environmental Health Perspectives—Harvard School of Public Health—February 1997
However, an extensive and exhaustive study in a journal called Environmental Health Perspectives by the Harvard School of Public Health paints a much more nuanced picture. The article starts with a detailed look at the entire respiratory system of birds, then looks at orally administered toxins, inhaled particulates, and toxic gases.
The general summary is that the bird respiratory system is not uniformly more problematic than ours. Sometimes it behaves similarly to humans, sometimes it’s more sensitive, and sometimes less.… READ THE REST