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Showing 1 to 8 of 8 for “"Grasshopper Sparrow"”.
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Nest predation and habitat selection in the grasshopper sparrow (Ammodramus savannarum)
… predation influenced nest-site selection by grasshopper sparrows (Ammodramus savannarum). I used near-infrared video cameras to identify nest predators and followed breeding females on multiple nesting attempts within a breeding season. Burning reduced losses by snakes (Thamnophis and Coluber …
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Avian Occurrence in Woodlands and Grasslands on Public Areas Throughout Eastern South Dakota
… species, the Upland Sandpiper and Dickcissel and Grasshopper Sparrow in the mixed grass prairie region. were positively associated with area of the grassland patch. The Sedge Wren. Clay-colored Sparrow and Savannah Sparrow were positively associated with the proportion of grassland habitat within …
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Effects of Grazing on Nongame Breeding brids, Insects, and Vegetation in Conservation Reserve Program Grasslands in North Dakota
… project CRP fields. The Lark Bunting, Grasshopper Sparrow, Red-winged Blackbird, and Brown-headed Cowbird composed a majority of the species composition in 1992 and 1993. Mean density of male birds (all species combined) exhibited a downward trend from 1992 to 1993 which was most likely …
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Passerine Use of Grasslands Managed With Two Grazing Regimes on the Missouri Coteau in North Dakota
… recorded in 1995, 30 in 1996 and 29 in 1997. Grasshopper sparrows, brown-headed cowbirds, and clay-colored sparrows occurred most frequently on point counts. No differences occurred between grazing regimes for species richness or relative abundance in 1996. However, in 1997, rotational grazing …
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Nesting Success of Grassland Birds in Fragmented and Unfragmented Landscapes of North Central South Dakota
… ); western meadowlark (Sturnella neglecta); grasshopper sparrow (Ammodramus savannarum); savannah sparrow (Passerculus sandwichensis); ringnecked pheasant (Phasianus colchicus); and dabbling ducks (Anas spp.). Response to landscape and patch variables varied among species. Larger patches were …
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Landscape Fragmentation and Grassland Patch Size Effects on Non-game Grassland Birds in Xeric Mixed-grass Prairies of Western South Dakota
… >85% of the total birds observed; these were: grasshopper sparrows, western meadowlarks, brown-headed cowbirds, chestnut-collared longspurs, bobolinks and red-winged blackbirds. Grasshopper sparrows and western meadowlarks were observed in >99% of grassland patches. Avian community composition …
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Land Cover Change and the Breeding Bird Survey: Rates of Change in Relation to Roads
… densities for 4 avian species (bobolink, grasshopper sparrow, Le Conte’s sparrow, and sedge wren) present in the prairie pothole region of Western Minnesota and Northwest Iowa for 5 dates. I further assessed these densities adjacent to and away from roads. My models for density estimates …
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Habitat selection in restored grasslands: the role of social cues in the settlement of Grasshopper Sparrows
… of social cues in the settlement behavior of Grasshopper Sparrows (Ammodramus savannarum) in new habitats. I played conspecific vocalizations at newly created grasslands and compared settlement rates and breeding densities at those sites to control sites, without vocalizations. A subset of …