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Mallard pair Kings Mountain National Military Park 19. Pair Of Mallards Photo by A.A. Allen, Cornell University
Mallard, female Kings Mountain National Military Park 10. Mallard Female Photograph by A.A. Allen Cornell Laboratory of Ornithology
Mallard perch Kings Mountain National Military Park 12. Mallard perch Photograph by A.A. Allen Cornell Laboratory of Ornithology
Mallard, male Kings Mountain National Military Park 11. Mallard Male Photograph by A.A. Allen Cornell Laboratory of Ornithology
Mallard flock, rising Kings Mountain National Military Park 32. Mallard Flock Rising Photograph by A.A. Allen Cornell Laboratory of Ornithology
Toxicity of Lead and Proposed Substitute Shot to Mallards Great Smoky Mountains National Park; National Park Service
1974
Significance of Lead Residues in Mallard Tissues Great Smoky Mountains National Park; National Park Service
Food Habits of the Mallard Ducks of the United States Great Smoky Mountains National Park; National Park Service
Yellowstone photo album 18, page 84 Yellowstone National Park

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