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Environmental News
Dan Gunderson
Thief Lake Wildlife Management Area

Ducks offer clues to avian influenza risk

Technicians show how they determine the sex of a Blue-winged Teal
Minnesota Department of Natural Resources waterfowl technicians Sophie Arhart and Ryan Dunnell show the wing colors of female and male Blue-winged Teal.
Dan Gunderson | MPR News

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