Nouns

(n)whistlersomeone who makes a loud high sound
(n)hoary marmot, whistler, whistling marmot, Marmota caligatalarge North American mountain marmot
(n)goldeneye, whistler, Bucephela clangulalarge-headed swift-flying diving duck of Arctic regions
(n)thickhead, whistlerAustralian and southeastern Asian birds with a melodious whistling call