The river the Yamuna flows southward along the eastern side of Delhi and offers excellent birding in winter and during migration when there are large numbers of wetlands. Okhla is arguably the best place for birding in Delhi. The locally distributed Striated Babbler, White-tailed Bushcat, Streaked Weaver are resident specialties here. Sultanpur Jheel is a small area of wetland, acacia woodland, and open dry area attracts wintering waterfowl as well as migrants. Although less than one square mile in area, Sultanpur Bird Sanctuary has an impressive list of 240 species and rarities turn up regularly. Common birds found in Sultanpur are Great White and Dalmatian Pelicans, Painted Stork, Asian Openbill, Woolly-necked and Black-necked Stork Greater Flamingo, Bar-headed Goose, Spot-billed Duck, Cotton Teal, Oriental Honey, Eurasian Marsh Harriers, Demoiselle Cranes, Pied Avocet and Small Anticole to name a few.