21 CMS.,ALSO CALLED AS LARGE-PIED WAGTAIL .IT IS A MEDIUM-SIZED BIRD AND IS THE LARGEST MEMBER OF THE WAGTAIL FAMILY.IT HAS BLACK UPPERPARTS HEAD AND BREAST WITH A WHITE SUPERCILIUM AND LARGE WHITE WINGBAR.UNLIKE WHITE WAGTAILS IT NEVER HAS WHITE ON THE FOREHEAD.THE REST OF THE UNDERPARTS ARE WHITE.THE FEMALE HAS THE BLACK LESS INTENSE THAN IN THE MALE.PIED PLUMAGE DISTINGUISHES THIS FROM ALL WAGTAILS EXCEPT BLACK-BACKED RACES OF WHITE WAGTAIL.BUT IT IS LARGER IN SIZE ,BLACK OF CROWN MEETING THE BILL(i.e. CONSPICUOUS WHITE SUPERCILIA DO NOT MEET) AND WING PATTERN.IT IS FOUND IN OPEN FRESH WATER WETLAND HABITATS.LIKE OTHER WAGTAILS THIS SPECIES IS INSECTIVOROUS.