The Forever Chemicals: What Do We Need to Know About Their Effects on Birds?

The last two decades have seen a marked increase in concern over the effects of polyfluoralkyl substances (PFAS) on humans and wildlife. PFAS often called “the forever chemicals,” are persistent contaminants that enter the environment from various sources, including manufacturing, landfills, and fire suppression. Among vertebrates, birds appear to be of particular concern for both exposure and effects. Reported effects on birds include early embryo mortality, failure to hatch, and high post-hatching mortality. The specific mechanisms causing these effects are still poorly understood but may include disruptions of thyroid hormone signaling and fatty acid metabolism.

Dr. Matt Etterson is the chair of the Research Committee at Hawk Ridge Bird Observatory. He will present findings from a recently completed study that surveyed birds of prey during migration at Hawk Ridge or admitted as patients to The Raptor Center.