Researchers from University of California, Davis and SUNY Buffalo equipped 54 Magellanic penguins with silicone ankle bands during the 2022‑24 breeding season. The passive samplers absorbed whatever chemicals the birds encountered in the remote Argentine coast, then were retrieved for lab analysis. Results showed detectable levels of PFAS in over 90% of the bands, proving the birds act as mobile monitoring stations.

The testing, performed at SUNY Buffalo, identified both legacy PFAS and newer substitutes such as GenX. Detecting replacement chemicals far from industrial hubs indicates these “forever chemicals” travel globally, reaching even isolated ecosystems. Senior author Diana Aga highlighted the shift from older to newer PFAS, suggesting current alternatives remain environmentally persistent.

By using a minimally invasive silicone passive sampler, the team demonstrated a scalable method for tracking pollutant exposure in hard‑to‑sample marine habitats. The approach could extend to other diving species, offering real‑time data on oil spills or shipwreck contamination. This study provides conservationists with a practical tool to assess wildlife health and oceanic chemical loads.