Each year, just at the first hint of spring thaw, massive waves of tundra swans begin a migratory trek from the Chesapeake Bay area, where they winter, to the Beaufort Sea in the Arctic, where they breed and nest. These magnificent birds aren't known to most North Americans, for their fly-past across the vast land is brief. A few days to rest and replenish at various locations in Southern Ontario and Manitoba, but no more. The imperative of an ancient biological clock calls them to keep moving north. For they have a precious few weeks to breed, nest and ready their fledglings for the 4200km return flight in the fall.
The video is part of a field report on the tundra swan migration, posted at perfectdayfactory.com/tundra-swans/

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