qT=2&tQ=Which bird is called the "water-witch" and the "hell-diver?"&tC=The oldsquaw|The grebe|The black skimmer|The red-throated loon&cC=2&fB=The grebe is called the "water-witch" or the "hell-diver" because of its agility and quickness on the water. When it senses danger, the grebe will sink slowly into the water, keeping its eyes just above the surface--just like a feathered periscope.<br><br>Grebes often carry their chicks on their backs. When the mother dives, the chicks go under with her. Because of their downy feathers, the chicks will come bouncing up to the surface like corks.