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Black-throated Diver - Gavia arctica - Summer adult. L 60-70cm. Swims buoyantly with bill held level. Dives frequently. Sexes are similar. Adult in summer has blue-grey nape and head, and black throat; sides of neck have black and white lines. Back is dark with white spots; underparts are white. In winter, upperparts mainly grey-black and underparts whitish; note white patch on flanks at water level in swimming birds. Juvenile is similar to winter adult but grubby-looking. Voice Mostly silent. Status Rare breeding species on large Scottish lochs. Scarce in winter, mainly in coastal waters.
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157403
Black-throated Diver - Gavia arctica - Summer adult. L 60-70cm. Swims buoyantly with bill held level. Dives frequently. Sexes are similar. Adult in summer has blue-grey nape and head, and black throat; sides of neck have black and white lines. Back is dark with white spots; underparts are white. In winter, upperparts mainly grey-black and underparts whitish; note white patch on flanks at water level in swimming birds. Juvenile is similar to winter adult but grubby-looking. Voice Mostly silent. Status Rare breeding species on large Scottish lochs. Scarce in winter, mainly in coastal waters.

Filename: 157403.jpg
Size: 3543x2363 / 4.6MB
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Date: 16 May 2015
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Credit: PAUL STERRY/Nature Photographers Ltd
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