Overview
- The peer-reviewed synthesis published July 23, 2026, found that roughly 51% of migratory bird species are declining across every major flyway.
- Researchers report nearly 300 migratory species are already globally threatened and that many once-common, widespread birds have steep population losses.
- The review identifies overlapping drivers including habitat loss, climate change, invasive species, collisions with buildings and infrastructure, disease, and pesticide use.
- Authors say new tools such as satellite and tag tracking, eBird community observations, AI acoustic monitoring, and population models made the global lifecycle analysis possible.
- The paper outlines a flyway- and lifecycle-scale conservation framework that calls for expanded monitoring, habitat protection, threat reduction, social‑science integration, and international cooperation and cites initiatives like Road to Recovery as models for scaling proven actions.