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Mallard - Wikipedia
Mallard Identification, All About Birds, Cornell Lab of ...
Mallard | Audubon Field Guide
Mallard Overview, All About Birds, Cornell Lab of Ornithology
Mallard - eBird
Mallard | Anatomy, Migration & Diet | Britannica
Mallard Life History - All About Birds
Mallard - National Geographic
Mallard - Oklahoma Department of Wildlife Conservation
Mallard Duck - National Geographic Kids