https://www.ducks.org/conservation/...waterfowl-tracking-the-mallard-migration

Mallard Tracking Facts
The average distance traveled by satellite-marked mallards during spring migration was more than 730 miles. The average distance traveled by individual birds during fall migration was almost 875 miles.
One of the first mallards (a drake) ever marked with a GPS satellite transmitter in Arkansas flew more than 500 miles during spring migration, from Minnesota to Saskatchewan, in only four days.
This same bird made a remarkable one-day flight in early fall from Saskatchewan to south-central Iowa—a distance of more than 900 miles!
Although fall migration commonly is thought of as a one-way trip, several mallards in the tracking study made south-to-north movements during fall and winter.


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