A medium-sized blue-and-white kingfisher with a big, heavy black bill. Bluish-green upperparts and chest band contrast with creamy white underparts and white neck patch. Tail and rump lighter blue. Found along slow-flowing lowland rivers. Common Kingfisher is smaller, with orange underparts, and Little Kingfisher is much smaller with a comparatively thinner, weaker bill. Bismarck is told from dwarf kingfishers by larger size, heavier bill, and plain blue upperparts not flecked white. Told from all other blue-and-white kingfishers by blue hindneck and lack of black mask. Call is a loud whistle, stronger and less hissing than Common Kingfisher’s.