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The Yellow-billed loon, the largest of the world’s five loon species, and also the rarest, has oneof the highest nesting densities in the world on the central Arctic Coastal Plain of Alaska (Earnstet al. 2005). In Alaska, this species typically breeds on the edges of relatively deep (>2 m), large(usu. >12 ha) fish-bearing lakes (http://alaska.fws.gov/). Little is known about their diet inAlaska, but they are believed to depend on several fish species, with cisco (Coregonus spp.)being the most important (J. Schmutz, pers. comm.). Although previously thought to winter offthe coast of the Pacific Northwest, new evidence suggests the North American breedingpopulation winters in East Asia from the western Kuril Islands...
The Arctic Coastal Plain Aerial Breeding Pair Survey provides data on distribution, abundance, and trend of 33 bird species that nest in northern Alaska. The survey has been conducted in its current form annually since 2007. Methods follow the standard operating procedures for the Waterfowl Breeding Population and Habitat Survey. Primary uses of the survey data are to evaluate recovery status of Spectacled Eider (Somateria fischeri) and Steller’s Eider (Polysticta stelleri), as well as monitor species of conservation concern including Lesser Snow Goose (Chen caerulescens caerulescens), Yellow-billed Loon (Gavia adamsii), Red-throated Loon (G. stellata), and Black Brant (Branta bernicla nigricans). Survey data are...
Categories: Data,
Project;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: ANIMALS/VERTEBRATES,
ANIMALS/VERTEBRATES,
ANIMALS/VERTEBRATES,
BIOLOGICAL CLASSIFICATION,
BIOLOGICAL CLASSIFICATION,
The Red-throated Loon is the smallest of the world’s five loon species. This species typicallybreeds in low wetlands in both tundra and forested terrain (Barr et al. 2000). They nest on pondedges, sometimes along very small ponds (<1 ha), particularly in parts of their range sympatricwith Pacific Loons (Barr et al. 2000). Red-throated Loons are unique in that they regularlyforage on fish away from their nesting ponds.In Arctic Alaska this often involves flights to theArctic Ocean (Andres 1993). Like Yellow-billed Loons, the North American breedingpopulation, north of 68° latitude, appear to winter primarily in East Asia from the western KurilIslands to the Yellow Sea (J. Schmutz et al., unpublished data). In 1993,...
Species: Bobolink; Brown Pelican; Burrowing Owl; Common Loon; Common Nighthawk; Ferruginous Hawk; Franklin's Gull; Grasshopper Sparrow; Horned Lark; Loggerhead Shrike; Long-billed Curlew; Marbled Murrelet; Mountain Quail; Olive-sided Flycatcher; Purple Martin; Red-necked Grebe; Sage Sparrow; Sage Thrasher; Sharp-tailed Grouse; Upland Sandpiper; Vesper Sparrow; Western Bluebird; White-breasted Nuthatch; White-headed Woodpecker; Yellow-billed Cuckoo; Great Gray Owl; Greater Sage-Grouse Seasons: Summer; based on Breeding Bird Survey (BBS) data, and winter; based on Christmas Bird Count (CBC) data Background: In completing its climate-impacts analysis for North American birds, Audubon has generated numerous maps...
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