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FACTORS INFLUENCING DISTRIBUTION AND STATUS
WATERFOWL DISTRIBUTION IN MISSOURI BASIN
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1954 BREEDING RANGE abundance Alaska American goldeneye April baldpate BASIN STUDIES PRESENT blue-winged teal breeding ducks breeding population Bufflehead Canada geese canvasback Colo Colorado coots drainage duck stamps eastern eggs are laid fall FISH AND WILDLIFE Fish Dept flocks Flyway Food gadwall gallinules Game and Fish game bird goose green-winged teal Gulf Coast habitat hunting season INTERIOR FISH Iowa irrigation Kansas large numbers Limiting Factors LoCreek mallards marshes merganser Mexico MISSOURI RIVER BASIN Montana Nebraska Nesting habits northern numbers of ducks P-R Quart percent permanent water areas pintails ponds prairie pothole Prog rails redhead Report reservoirs Ring-necked Duck RIVER BASIN 1954 RIVER BASIN STUDIES Ruddy Duck scaup Sept SERVICE MISSOURI RIVER small numbers South Dakota spring migration streams STUDIES PRESENT DISTRIBUTION Trend and Limiting trumpeter swans UNITED STATES DEPARTMENT vegetation western Wetlands white-fronted White-winged Scoter Wild WILDLIFE SERVICE MISSOURI Wilson's snipe Wintering Range wood duck Wyoming