How many birds in this world

Did You Know: There are about 10,000 bird species in the world and about half of them migrate. That’s an estimated 50 billion migratory birds out of the 200-400 billion individual birds on the planet. In eastern North America over two-thirds of all breeding birds migrate. They travel by day and by night across vast stretches of land and sea. They navigate using familiar landscapes, mental star cha

rts, magnetic fields, and angles of ultra-violet light emitted by the setting sun that are invisible to us. Worshiped as gods by some past cultures, written into poetry, painted on canvas, studied by scientists, and loved by birders, migrating birds are a marvel. From warblers to waterfowl, hummingbirds to hawks – each is a remarkable story. This fall, climb a hill and watch the hawks glide southward one sunny day. Or just before bedtime in a quiet place, go out and listen toward the sky. If you listen closely, you might hear the waves of songbirds overhead calling to each other as they head south for the winter.

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