41. Other abundant waterbirds include wandering whistling ducks, Pacific black ducks and Katherine area. 42. The water nymph is an bittern, a native waterbird related to the heron. 43. It is an important wetland for over 250 species of resident and migratory waterbirds . 44. They are important for a variety, and sometimes large numbera, of waterbirds . 45. The wetlands have an important ecological role by providing home and food to waterbirds . 46. By the second year, summer counts of waterbirds had declined by 85 %. 47. During the rainy season migrant Palearctic waterbirds flock to the streams in large numbers. 48. Volunteers patrolling the beaches found three dead oil-muddied waterbirds Thursday, Sasa said. 49. This festival is held in the month of October, during the migration of waterbirds . 50. The forests are important breeding areas for colonial waterbirds and are visited by migratory birds. 