# BirdLife International says the changing journeys of the world’s birds reveal real strain on the natural systems the world depends on. Today marks the World Migratory Bird Day focusing on the theme, Every Bird Counts – Your Observations Matter. BirdLife International CEO, Martin Harper says migratory birds carry nutrients across oceans, pollinate plants, spread seeds, and help keep crops growing and diseases in check. He says worldwide, more than 40-percent of bird species are now in decline:
World Migratory Bird Day: BirdLife International says more than 40-percent of bird species now in decline [SOUND]
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