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CCLOChestnut-Collared Longspur (bird species Calcarius ornatus)
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Birds that could lose all of their current range by 2080 include the American avocet, brown rosy-finch, brown-headed nuthatch, chestnut-collared longspur, eared grebe, northern gannet, northern saw-whet owl, trumpeter swan, white-headed woodpecker, and yellow rail.
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
For example Lloyd and Martin (2005) found nestlings of chestnut-collared longspurs grew more slowly and had a 17% lower chance of surviving in crested wheatgrass fields compared lo native grasslands of northeast Montana.
Chestnut-collared Longspurs (Calcarius ornatus) require vegetation that is moderate in stature, sparse, with low to moderate forb cover, sparse litter, and low amounts of bare ground and woody vegetation.