The waterscape in the delta of the Senegal River intertwines rivers, oxbows, wetlands, mangroves, floodplains, lakes, backwaters, and lagoons. It holds the Diawling National Park and the Chat Tboul RAMSAR sites. The Basin is a safe haven for a variety of birds; namely, the great white pelican, American flamingo, slender-billed gull, pied avocet, cormorants, storks, spoonbills, egrets, herons, ducks, geese, swans and waders. The coastal landscape is marked by the heliotrope, balsam spurge, tamarisk, and Zygophyllum waterlotti growing in sandy dunes. The insular zones and estuaries are home to black mangroves, tamarisk and glaucous glasswort. The common warthog, golden jackal, patas monkeys and desert crocodile find refuge in the biosphere tropical savannah. The reserve is home to a mix of economic plants, such as the dropseed species, Arabic gum, Tiger lotus, white water lily and the true and black mangroves. It nestles flocks of over 3 million birds stopping over from November to May in the 'Oiseaux du Djoudj' National Park, which is designated as a World Heritage site.