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REVIEW OF RANGES POPULATIONS AND NOMENCLATURE
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Anatinae areas Atlantic Flyway average behavior birds Black Duck Displays Black Duck population bout breeding range characters coastal coloration Common Mallard courtship Delacour diazi distribution Domestic Fowl Down-up dusky eastern electrophoretic estimate feathers female Mallards Figure Florida Duck forms frequency fulviqula Gadwall genetic geographic Grunt-whistle habitat Head-up-tail-up hybrids Index indicated Johnsgard lard large numbers Lorenz Louisiana maculosa male displays male Mallards male plumage Mallard Displays Mallard populations mallard-like Mallards and Black mate maxilla Meller's Duck Mexican Duck Mexico Mississippi Flyway morphological Mottled Duck nesting Nod-swimming North American mallards novimexicana numbers observed ovoconalbumin ovomucoid pair formation percent percentage period Phillips Pintail platvrhvnchos plumage plumage differences Poisson distributions present probably PROPORTIONS OF WINTERING pure Mallard recorded region relatively Ridgway rubripes samples sexual dimorphism sexual displays sexual selection sexually non-dimorphic species specimens speculum subspecies sympatry transect variations waterfowl wintering Black Ducks WINTERING MALLARDS