Calcarius

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Related to Calcarius: longspurs

Calcarius

a genus of birds of the family Emberizidae. The body is 14–16 cm long. The claw of the rear digit is elongate and slightly decurved. Reddish yellow tones predominate in the plumage. There are four species. The Lapland longspur (C. lapponicus) is found in the circumpolar tundra of the USSR. In the winter the bird migrates to the steppes. The Lapland longspur nests on the ground. A clutch contains four to six eggs, which are incubated mainly by the female for 13 or 14 days. Lapland longspurs feed on seeds and insects. The remaining three species of Calcarius live in North America—one in the tundra and two on the prairies and dry plains of western Canada and the United States.

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A distributional summary and some behavioral notes for Smith's Longspur, Calcarius pictus.

Winter bird habitat use in a heterogeneous tallgrass prairie

For example, McLaughlin and Montgomerie (1985) studied lapland longspurs (Calcarius lapponicus) to test Norberg's (1981) hypothesis that birds feeding nestlings would fly faster than [V.sub.mr], in order to minimize commuting time.

Flight speed of foraging common nighthawks (Chordeiles minor): does the measurement technique matter?

In late April 2011, photographs of an apparent male snow bunting (Plecirophenax nivalis) x Lapland longspur (Calcarius lapponicus) hybrid were taken at St.

First report of a snow bunting x Lapland longspur hybrid

Nest densities were significantly higher at Teshekpuk than at Prudhoe Bay for Lapland longspurs (Calcarius lapponicus) and long-billed dowitchers (Limnodromus scolopaceus), although those for semipalmated sandpipers (Calidris pusilla) were higher at Prudhoe Bay.

Breeding ecology of birds at Teshekpuk Lake: a key habitat site on the Arctic Coastal Plain of Alaska

In all survey years, snow bunting (Plectrophenax nivalis), Lapland longspur (Calcarius lapponicus), and Baird's sandpiper (Calidris bairdii) were the most abundant species.

Breeding bird surveys at Alexandra Fiord, Ellesmere Island, Nunavut (1980-2008)

The most commonly observed passerine species appearing at the Chukotka land sites in significant numbers that indicated migratory behaviour were eastern yellow wagtail (Motacilla tschutschensis), American pipit (Anthus rubescens), lapland longspur (Calcarius lapponicus), snow bunting (Plectrophenax nivalis), common redpoll (Carduelis flammed) and hoary redpoll (C.

Radar observations of Arctic bird migration in the Beringia region

Lemmings have been implicated in nest failure in Lapland longspurs (Calcarius lapponicus) although it is unclear whether they prey on eggs or disrupt nest contents (Custer and Pitelka, 1977).

Point counts underestimate the importance of Arctic foxes as avian nest predators: evidence from remote video cameras in Arctic Alaskan oil fields

We evaluated the impact of new (0.5-1.5 years old) and old (10-35 years old) visible seismic lines within the sanctuary on the abundance of breeding passerines (savannah sparrow, Passerculus sandwichensis; Lapland longspur, Calcarius lapponicus; common redpoll, Carduelis flammea: American tree sparrow, Spizella arborea; and red-necked phalarope.

Effects of seismic lines on the abundance of breeding Birds in the Kendall Island Bird Sanctuary, Northwest Territories, Canada

Snowy owl harfang des neiges Nyctea scandiaca 18 Short-eared owl hibou des marais Asio flammeus 29 Common raven grand corbeau Corvus corax 26 Horned lark alouette hausse- Eremophila 82 col alpestris American pipit pipit d'Amerique Anthus rubescens 100 American tree bruant hudsonien Spizella arborea 88 sparrow Savannah sparrow bruant des pres Passerculus 85 sandwichensis White-crowned bruant a couronne Zontrichia 53 sparrow blanche leucophrys Lapland longspur bruant lapon Calcarius 100 lapponicus Snow bunting bruant des neiges Plectrophenax 26 nivalis Common/hoary sizerin flamme/ Carduelis flammea/ 32 redpoll blanchatre hornemanni TABLE 2.

An Arctic-breeding bird survey on the northwestern Ungava Peninsula, Quebec, Canada

The most common species within the study area include Lapland longspur (Calcarius lapponicus), savannah sparrow (Passerculus sandwichensis), American tree sparrow (Spizella arborea), horned lark (Eremophila alpestris), and least sandpiper (Calidris minutilla).

Effects of a diamond mine on tundra-breeding birds

White-rumped sandpiper (Calidris fuscicollis) and red phalarope (Phalaropus fulicarius) were the most abundant shorebirds breeding at Creswell Bay, and Lapland longspur (Calcarius lapponicus) was the most abundant breeding passerine.

Shorebird and passerine abundance and habitat use at a High Arctic breeding site: Creswell Bay, Nunavut

At the comparatively species-rich Dundas Harbour area, a few passerine species were recorded as well, including migrants such as horned lark Eremophila alpestris, northern wheatear Oenanthe oenanthe, lapland longspur Calcarius lapponicus, and snow bunting.