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DickDickcissel (bird species Spiza americana)
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Eastern Meadowlark nests contained an average of 4.1 host eggs per nest (range 1-6; SE = 0.17); Grasshopper Sparrow nests contained an average of 3.8 host eggs per nest (range 1-5; SE = 0.24); and Dickcissel nests contained an average of 3.9 host eggs per nest (range 2-5; se = 0.21).
Key words: Nebraska Natural Legacy Project, Biologically Unique Landscape, Conservation Priority, Grassland Species, Brownheaded Cowbird, Dickcissel, Grasshopper Sparrow, Meadowlark
Nest predation and its relationship to habitat and nest density in dickcissels. Condor 86:68-72.
Seven confirmed or probable breeders [Northern Bobwhite (Colinus virginianus), Whip-poor-will, Redheaded Woodpecker (Melanerpes erythrocephalus), Field Sparrow, Grasshopper Sparrow, Dickcissel, and Eastern Meadowlark (Sturnella magna)] are of conservation concern at national and physiographic levels (Fitzgerald et al.
The dickcissel invasion of 1964 in southern Wisconsin.
Vegetative features Baird's Chestnut-collared Sparrow Longspur Mean vegetation height (cm) 14-30 15-23 Maximum height (cm) 30-43 unknown Visual obstruction reading (cm) 6-21 6 Forb cover (%) 25 6-18 Shrub cover (%) 1-20 [less than or equal to] 3 Bare ground (%) unknown 1-15 Litter depth (cm) <4 2 Vegetative features Dickcissel Mean vegetation height (cm) 20-98 Maximum height (cm) 150 Visual obstruction reading (cm) 14-82 Forb cover (%) 3-60 Shrub cover (%) [less than or equal to] 11 Bare ground (%) [less than or equal to] 16 Litter depth (cm) [less than or equal to] 5
These birds included 1 vulture, 10 raptors, 1 quail, 6 doves, 1 cuckoo, 3 owls, 1 swift, 2 hummingbirds, 5 woodpeckers, 7 flycatchers, 1 shrike, 2 vireos, 1 jay, 2 crows, 6 swallows, 1 chickadee, 1 titmouse, 5 wrens, 1 kinglet, 1 gnatcatcher, 3 thrushes, 3 mimic thrushes, 1 starling, 1 pipit, 1 waxwing, 11 warblers, 1 tanager, 13 sparrows, 1 cardinal, 1 grosbeak, 2 buntings, 1 dickcissel, 2 blackbirds, 1 meadowlark, 2 grackles, 1 cowbird, 1 oriole, 1 goldfinch, 1 finch, and 1 weaver finch.
Distribution and abundance of the Dickcissel. Current Ornithology 4:211-242.
Ferruginous hawk Northern harrier Greater prairie chicken (NA) Sharp-tailed grouse Ring-necked pheasant Mountain plover (NA) Long-billed curlew Upland sandpiper Barn owl (NA) Burrowing owl Short-eared owl Horned lark Sedge wren Sprague's pipit Bobolink (above) Eastern meadowlark (left) Western meadowlark Dickcissel Lark bunting Savannah sparrow Grasshopper sparrow Baird's sparrow LeConte's sparrow Henslow's sparrow Cassin's sparrow Vesper sparrow McGown's longspur Chestnut-collared longspur *Key: Declining Increasing Stable Insufficient data (NA) For More About Grasslands
At least one long-distance migrant (Dickcissel) has fewer broods than short-distance relatives (many species), but Indigo Bunting, which is a long-distance migrant, has as many broods as short-distance relatives (Appendix 1) and provides a counterexample.
We focused on seven grassland bird species: sedge wren (Cistothorus paltensis), Savannah sparrow (Passerculus sandzmchensis), grasshopper sparrow (Ammodramus savannarum), Henslow's sparrow (Ammodramus hensloxmi), dickcissel (Spiza americana), bobolink (Dolichonyx oryzivorus), and western meadowlark (Sturnella neglecta).
Historically, the dickcissel (Spiza americana) was common throughout the Blackland Prairie Region, but there have been significant declines during the past 3 decades (Herkert, 1995; Peterjohn and Sauer, 1999; Vickery and Herkert, 2001).