CTTAP, XVIII.] 
BIRDS. 
363 
Order IX.— AN SERE 3. 
Family 118. — ANATID/E. (40 Genera, 180 Species.) 
General Distribution. 
X KoTROPlCAL 
Sub-regions. 
Nearctic 
Sub-regions. 
Palasarctic 
Sue- regions. 
Ethiopian 
Sub-regions. 
| Oriental 
Sub-regions. 
Australian 
Sub-regions. 
1 . 2 . 3. 4 
1 . 2 . 3. 4 
1 . 2 . 3 .4 j 
1 . 2 .3 .4 
1 . 2 . 3.4 
1 . 2 . 3 . 4 
The Anatidre, comprehending the Ducks, Geese, and Swans 
with their allies, are of such universal distribution that there is 
probably no part of the globe where some of them are not 
occasionally found. They are, however, most abundant in tem- 
perate and cold regions ; and, contrary to what occurs in most 
other families, the most beautifully-coloured species are extra- 
tropical, and some even arctic. The distribution of the genera 
is as follows : — 
Anseranas (1 sp.), Australia ; Pledropterus (2 sp.), Tropical 
Africa ; Sarkidiornis (1 sp.), South America, Africa, and India ; 
Chcnalopex (1 sp.), Amazonia ; Callochen (1 sp.), South Europe, 
North, East, and South Africa ; Cereopsis (1 sp.), Australia ; 
Anser (13 sp.), Palsearctic and Nearctic regions to Central 
America and the Antilles ; Bernicla (12 sp.), Temperate regions 
of the Northern and Southern Hemispheres ; Ckloephaga (5 sp.), 
South Temperate America and Aleutian Islands ; Nettapus (4 
sp.), Tropical Africa and Madagascar, India and Ceylon to 
Malaya and Australia; Cygnus (10 sp.), Temperate regions of the 
Northern and Southern Hemispheres; Dendrocygna (10 sp.), 
Tropical and sub-tropical regions ; Tadorna (3 sp.), Pakearctic 
and Australian regions ; Casarca (5 sp.), Palsearctic, Oriental, 
Ethiopian, and Australian regions, to New Zealand; Aix (2 sp.), 
Temperate North America and Eastern Asia; Mareca (4 sp.), 
Palsearctic region, North America, Temperate South America, 
and Australia ; Dafila (3 sp.), all America and the Palsearctic 
region; Anas (16 sp.), cosmopolitan; Qucrquedula (17 sp.), 
