EditorialCambarus clarkii, Print, Cambarus is a large and diverse genus of crayfish from the United States and Canada. The adults range in size from about 5 centimeters (2 in) up to approximately 15 centimeters (6 in).
EditorialWestern grey squirrel, Sciurus griseus clarkii. (Clark's squirrel, Sciurus clarkii.) Drawn by Charles Hamilton Smith at the Philadelphia Museum. Handcoloured copperplate engraving from Edward Griffith's The Animal Kingdom by the Baron Cuvier, London, W...