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Gadwall Identification, All About Birds, Cornell Lab of ...
Gadwall - Wikipedia
Gadwall Overview, All About Birds, Cornell Lab of Ornithology
Gadwall - eBird
Gadwall | Audubon Field Guide
Gadwall Life History - All About Birds
Gadwall - U.S. Fish and Wildlife Service
Gadwall (Duck) - ID, Facts, Diet, Habit & More | Birdzilla
Gadwall Diet and Size: Feeding Habits, Predators, and ...
Gadwall Ducks - AnimalBehaviorCorner