WordNet sense 1 (United States painter (1834-1903)):

James Abbott McNeill Whistler

WordNet sense 2 (large North American mountain marmot):

hoary marmot, Marmota caligata, whistling marmot

WordNet sense 3 (large-headed swift-flying diving duck of arctic regions):

goldeneye, Bucephela clangula

WordNet sense 4 (Australian and southeastern Asian birds with a melodious whistling call):

thickhead