31 TO 35 CMS.,BLUE WHISTLING THRUSH IS DARK VIOLET BLUE WITH SHINY SPANGLING ON THE TIPS OF BODY FEATHERS OTHER THAN ON THE LORES,ABDOMEN AND UNDER THE TAIL.WING COVERTS ARE A SLIGHTLY DIFFERENT SHADE OF BLUE AND MEDIAN COVERTS HAVE WHITE SPOTS AT THEIR TIPS.THE BILL IS YELLOW AND STANDS IN CONTRAST.THE INNER WEBS OF FLIGHT AND TAIL FEATHERS IS BLACK.FOUND IN TEMPERATE FORESTS AND SUBTROPICAL OR TROPICAL MOIST MONTANE FORESTS.THEY MAKE ALTITUDINAL MOVEMENTS IN HIMALAYAS,DESCENDING IN WINTERS.THEY HOP ON ROCKS AND MOVE ABOUT IN QUICK SPURTS.THEY TURN OVER LEAVES AND SMALL STONES COCKING THEIR HEADS AND CHECKING FOR MOVEMENTS OF PREY.WHEN ALARMED THEY SPREAD AND DROOP THEIR TAIL.THEY FEED ON FRUITS, EARTHWORMS,INSECTS,CRABS AND SNAILS.IN CAPTIVITY THEY CAN KILL MICE AND EAT IT.IN WILD THEY CAN PREY SMALL BIRDS.