Half of all bird species undertake annual migrations, everything from heavy-bodied swans to delicate hummingbirds. Migration is one of the most remarkable phenomena on the planet, hosts of animals of all shapes and sizes demonstrating incredible feats of endurance.
Andy Wisher
Narrator
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January 1, 2020
50m
10.0
Phil Coles
N/A
1
Doclights
DE
