...This is one of the most natural genera in the modern systems of conchology, as it includes all fresh-water bivalves having two rough cardinal teeth in one valve and one in the other... 
William Swainson 「Zoological Illustrations, Volume I」
...They frequent barsleft bare by the tide and, it is said, use their stout bills to force openmussels; oysters, or other bivalves left exposed by the water...
Frank M. Chapman 「Color Key to North American Birds」
...Here they feed on mussels and other bivalves, limpets,worms, crustacea, and small fish; mixing freely with other birdswhile on the ground, but keeping to themselves while performingtheir flights...
Rev. C. A. Johns 「British Birds in their Haunts」
便利！手書き漢字入力検索
この漢字は何でしょう？？