World Migratory Bird Day |25 May 2026

What birds can tell us about the health of our world

As migration peaks this May, BirdLife International says the changing journeys of the world’s birds reveal real strain on the natural systems we all depend on.

World Migratory Bird Day falls on May 9 annually. To mark it, BirdLife International is asking people to look beyond the wonder of migration and listen to what the birds are saying about the health of our planet.

Migratory birds carry nutrients across oceans, pollinate plants, spread seeds, and help keep crops growing and diseases in check. And yet, worldwide, more than 40% of bird species are now in decline. Martin Harper, the chief executive of BirdLife International, said the signals coming from the great migratory routes are hard to ignore.

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