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Showing 1 to 10 of 10 for “"dabbling ducks"”.
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Stopover duration and habitat use of spring-migrating dabbling ducks in the Wabash River Valley, USA
… Illinois provides habitat for over 500,000 dabbling ducks each spring. Despite the heavy use of this region, information regarding stopover duration and habitat use of waterfowl is lacking. Stopover duration, or the length of time an individual spends in a distinct region, is an important …
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Ecology of spring-migrating waterfowl within the lower Wabash River floodplain
… peak abundances of >300,000 and >700,000 ducks during early February in 2012 and 2013, respectively. The grid-based sampling approach proved effective for estimating waterfowl abundance in this region given its relatively precise estimates (mean CV < 0.30 for dabbling ducks), high …
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Habitat Area Requirements of Prairie Wetland Birds in Eastern South Dakota
… higher near semipermanent wetlands in which dabbling duck species richness was at a maximum compared to wetlands without dabbling ducks. Despite the importance of wetland and upland vegetation, multiple and logistic regression analyses indicated that wetland area was the best single predictor …
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Seasonal population levels, breeding and hunting of waterfowl on the New River, Virginia
… were observed, including 8 species of diving ducks, 7 species of dabbling ducks and 1 species of goose. Species diversity was highest in February and March and lowest in the summer months. Mallards were sighted more frequently than any other species, followed by the wood duck and the black …
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Breeding Waterfowl Use of Intermittent Streams, McHenry County, North Dakota
… narrow meandering portions of the streams. High dabbling duck (Anas spp.) densities were observed in 1977 and 1978; 6.11 pairs per ha and 5.60 pairs per ha, respectively, for the first census of each year. Accepting blue-winged teal (A. discors), numbers of dabbler pairs were similar in 1976 and …
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Waterfowl Pair and Brood Use of Dug brood Complexes in East-Central South Dakota
… season, and therefore, produced few or no ducks. With improved water conditions in 1982, there were both greater brood densities and brood species diversities on wetlands with excavated ponds than on unmodified wetlands. This may be attributed to more open water, deeper water in excavated …
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Estimating Forage Production for Waterbirds and Waterbird Response to Habitat Management at Lacreek National Wildlife Refuge, South Dakota
… not capable of supporting the average number of dabbling ducks migrating and wintering on the refuge. In 2008 and 2009, sampled impoundments produced an average of 2,500 kg/ha and 2,000 kg/ha of achenes and tubers, respectively. Using waterfowl use-day estimates, it was determined that based …
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Nesting Success of Grassland Birds in Fragmented and Unfragmented Landscapes of North Central South Dakota
… ringnecked pheasant (Phasianus colchicus); and dabbling ducks (Anas spp.). Response to landscape and patch variables varied among species. Larger patches were positively correlated with daily survival of chestnut-collared longspur and dabbling duck nests. Parasitism rates of savannah and …
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Avian Nesting Densities and Success in Introduced Cool-Season Grass-Legume Plantings Versus Warm-Season Native Grass Planting in South Dakota 2002-2003
… WSN, and as the 2002 nesting season progressed, dabbling ducks (Anas spp.) and red-winged blackbird (Agelaius phoeniceus) nest densities were higher in DNC than WSN. In 2003, no differences in nest densities were detected for any species. Passerine nest numbers were insufficient to statistically …
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FORAGING BEHAVIOR OF DUCKS DURING SPRING MIGRATION IN THE WABASH RIVER REGION, ILLINOIS
… the system. I used a guild of spring migratory ducks as a model system and manipulated food abundance in areas differing in presumed risk to assess the relative effects of food abundance, predation risk, competition, and life history characteristics on foraging strategies used by ducks. Using a …