L. Forró szerk.: Miscellanea Zoologica Hungarica 12. 1998 (Budapest, 1998)

Bankovics, A.: Distribution data of wildfowl (Aves: Anatidae) in the Khangai Mountain in Mongolia

Table 1. Number of individuals of wildfowl species at the three sites studied in the Khangai Mountain Species Mandai Bajan Obo Bajan Hongor Whooper Swan Cygnuscygnus 2 Bar-headed Goose Anser indicus 20 40 Common Shelduck Tadoma tadorna 1 4 Ruddy Shelduck Tadorna ferruginea 12 31 2 Spot-billed Duck Anas poecilorhyncha 1 Mallard Anas platyrhynchos 6 90 3 Garganey Anas querquedula 2 Common Teal Anas crecca 9 Eurasian Wigeon Anas penelope 12 Gadwall Anas strepera 26 Shoveler Anas clypeata 10 Pochard Ay thy a ferina 20 Tufted Duck Ay thy a fuligula 51 Common Goldeneye Bucephala clangula 9 Goosander Mergus merganser 14 1 The study area The main habitat types were high mountain rivers, mountain tundra in about 2500-2700 m above sea level at Mandai, further more perpetually frozen mountain meadows, mountain lakes in about 2000 m about sea level at Bajan Obo. All the above mentioned mountain wetland types were surrounded by dry mountain steppes without any forest nearby. Higher in the mountain there were some smaller forest patches of Larch (Larix sp.) usually in the northern slopes. Results Whooper Swan (Cygnus cygnus Linnaeus, 1758) Two specimens, probably one breeding pair, was recorded on the mountain-tundra lake at Bajan Obo on 15 June and 17 June. Bar-headed Goose (Anser indicus Latham, 1790) It is considered as a near-threatened species as a whole in world-wide (del Hoyo et al. 1992). The Khangai Mountain lies within the north-eastern most boundary of this species distribution patches covered. It was a common bird in the study area observed every day at Mandai from 6 to 15 June with a maximum number of 20 adult birds on a 10 km stretch of the Cagan Turut Gol mountain streams valley. One breeding pair with 4 one-week-old downy goslings was found at Mandai on 6 June. The rest of the birds were non-breeding adults often sitting on the rocky peaks along the mountain stream