Many Siberian nesting birds moult or rest at Lake Tengiz before migrating to the Caspian Sea, the Persian Golf, Western Europe. Some continue to the Mediterranean Basin or Africa. About 2 million waterfowl are involved, including 25,000 Black-necked Grebes, 200,000 White-fronted Geese, 240,000 Shelducks, 50,000 Goldeneyes, and 80,000 Red-necked Phalaropes.