BirdLife International report warns of decline in 45% of migratory bird species

The State of the World’s Birds 2026 report, released by BirdLife International at the Global Flyways Summit in Nairobi, reveals that 45% of the world’s 1,843 migratory bird species are in decline. The assessment highlights that one in nine migratory species is currently threatened with extinction, with 200 species (11%) identified as being at risk. Among these, 32 are classified as critically endangered.

Species relying on marine and coastal habitats are particularly vulnerable. Approximately 54% of migratory shorebirds and 49% of migratory seabirds are experiencing population declines. The report notes that the East Asian-Australasian Flyway shows the highest proportion of declining species at 53%. Additionally, 58% of the habitats used by these birds for breeding, feeding, and resting are categorized as being in poor or very poor condition.

Key drivers of these declines include human activity, such as hunting, agricultural expansion, climate change, invasive species, and habitat loss. The report also notes the recent official extinction of the Slender-billed Curlew in 2025, marking a significant loss for Eurasian and African biodiversity. In response, the Nairobi Flyways Declaration was signed by various governments and organizations to commit to the protection of vital migratory routes.