36 
NATURAL HISTORY. 
[EAST. ZOOL. 
Cases 147—149. 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 149. The Spinous-tailed Ducks are found in the warmer 
parts of the world, as the lobated duck of Australia, Ural duck, &c. 
Case 150. The Mergansers inhabit the Arctic regions; their food 
consists principally of fish, &c. ; as the goosander merganser, red¬ 
breasted merganser, hooded merganser, &c. 
Cases 151, 152 contain the Divers: they form two divisions. 
Case 151. The True Divers are found in northern regions, and 
are rapid divers, feeding on fish ; as the northern diver, black-throated 
diver, &c. 
Case 152. The Grebes inhabit most parts of the world, feeding on 
small fish, crabs, &c.; as the eared grebe, crested grebe, &c., of Britain. 
Cases 153, 154 contain the Auks; these are oceanic birds, inhabit¬ 
ing the Arctic circles, feeding on fish and other marine productions, 
and are thus divided: 
Case 153. The True Auks; as the great auk of Orkney, puffin auk, 
razor-billed auk of the British shores, &c. 
Case 154. 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 155 —160 contain the Gulls: these birds are divided as fol¬ 
lows : 
Case 155. 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, Sec. ; giant petrel, 
wandering albatross, &c. 
Cases 157—159. 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 160. 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, &c., o. 
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 lower mandible, the upper being elevated out of the water, 
until the prey is felt by the lower ;*as in the black skimmer. 
Case 161. 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 white-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 162 
and 163. White pelican, red-backed pelican, &c. Case 161. Common 
cormorant, shag of Britain, &c.; and Case 166. Greater frigate bird, 
and lesser frigate bird. 
