Migratory birds from the Himalayan region are arriving in Odisha's wetland sites, including Chilka and Bhitarkanika National Park, seeking a congenial winter habitat. Ornithologists are delighted by the influx of species like Indian Skimmers, Grey Pelicans, and endangered vultures. The birds are drawn to the food security and human-interference-free environment of these marshy areas, adding to the scenic beauty as temperatures drop in their native northern habitats.