Bay Area peregrine falcon numbers began plummeting after a massive, global outbreak of avian flu in 2020, the study documents, with only about a third of the nesting sites still in use as of 2025. The news, while dire, nevertheless helps scientists understand how the disease is impacting local populations, and what we can expect for their recovery.
Our team has been so dedicated working around the clock, over time, whatever it takes to continue monitoring this outbreak. It's a really hard, emotional thing to go through as undergraduate, graduate students and young scientists to watch the seals that you've gotten to know over the years get sick.