34 
NATURAL HISTORY. 
[EAST. ZOOL. 
Cases 148—150. The Sea Ducks are principally inhabitants of the 
ocean or saline lakes, and are sometimes found on rivers of the inte¬ 
rior, seeking for small crabs, shell-fish, &c.; as the scoter duck, eider 
duck, tufted duck, nyroca duck, red-crested duck of Britain, &c. 
Case 150. The Spinous-tailed Ducks are found in the warmer 
parts of the world, as the lobated duck of Australia, Ural duck, &c. 
Case 151. The Mergansers inhabit the Arctic regions ; their food 
consists principally of fish, &c. ; as the goosander merganser, red¬ 
breasted merganser, hooded merganser, &c. 
Cases 152, 153 contain the Divers: they form two divisions. 
Case 152. The True Divers are found in northern regions, and 
are rapid divers, feeding on fish ; as the northern diver, black-throated 
diver, &c. 
Case 153. The Grebes inhabit most parts of the world, feeding on 
small fish, crabs, &c.; as the eared grebe, crested grebe, &c., of Britain. 
Cases 154, 155 contain the Auks; these are oceanic birds, inhabit¬ 
ing the Arctic circles, feeding on fish and other marine productions, 
and are thus divided: 
Case 154. The True Auks ; as the great auk of Orkney, puffin auk, 
razor-billed auk of the British shores, &c. 
Case 155. The Sea Parrots; as the parroquet auk, crested auk, Cape 
penguin, crested penguin, &c.; the Guillemots; as the foolish guillemot, 
black guillemot of Britain. 
Cases 156 —161 contain the Gulls : these birds are divided as fol¬ 
lows : 
Case 156. The Petrels, which are found in the high latitudes of 
both hemispheres, feed on fish, &c.; as the diving petrel, stormy petrel, 
Manks petrel, Fulmar petrel, and broad-billed petrel, &c.; giant petrel, 
wandering albatross, &c. 
Cases 158—160. The True Gulls: they are found in every part of 
the world, feeding on all kinds of animal matter, fish, &c.; as the Arctic 
gull, glaucous gull, black-backed gull, little gull, &c., of Britain; fork¬ 
tailed gull, kittiwake gull, &c. 
Case 161. The Terns are met with on every coast in the world, and 
occasionally inland, on the lakes, feeding on marine productions; as 
the Caspian tern, roseate tern, gull-billed tern, minute tern, Sec., of 
Britain; white-winged tern, &c. The Skimmers have remarkably 
formed bills, that enable them to skim the surface of the sea, in which 
they dip the low^er mandible, the upper being elevated out of the water, 
until the prey is felt by the lower; as in the black skimmer. 
Case 162. The Tropic Birds are peculiar to tropical climates, 
where they catch the flying fish, &c., as the common tropic bird, red-tailed 
tropic bird, &c. The Darters live in small flocks, on the trees that 
overhang the rivers, &c., from whence they plunge into the water, and 
catch fish by darting at them with their sharp bill and long vibrating 
neck; as the wdiite-bellied darter, &c. 
Cases 162—166. The Pelicans that inhabit the marshes and sea 
coasts, feeding on fish, &c.; as the gannet of Britain, &c. Cases 163 
and 164. White pelican, red-backed pelican, &c. Case 165. Common 
cormorant, shag of Britain, Sec .; and Case 166. Greater frigate bird, 
and lesser frigate bird. 
