 Some of the more spectacular include the red-billed tropicbird, the Arabian bustard, the Egyptian plover, the golden nightjar, the red-throated bee-eater, the chestnut-bellied starling, the cricket warbler, the Kordofan lark and the Sudan golden sparrow.The Djoudj National Bird Sanctuary on the south side of the Senegal River Delta is an important site for migrating and overwintering waterfowl.About three million migratory birds spend the winter here.