i 
X 3 R E F A C £,' 
Among them, the Swallow tribe is remarkably agile, their 
evolutions fudden, and their continuance on wing long. 
Nature hath denied flight to the Struthious ; but (till, in 
running, their fhort wings are of ufe, when eredt, to colled the 
wind, and, like fails, to accelerate their motion. 
Many of the greater Cloven-footed Water-fowl, or Waders, 
have a flow and flagging flight ; but moft of the lefier fly 
fwiftly, and moft of them with extended legs, to compenfate 
the fhortnefs of their tails. Rails and Gallinules, fly with 
their legs hanging down. 
Coots and Grebes, with difficulty are- forced from the water ; 
but when they rife, fly fwiftly. Grebes, and alfo Divers, fly 
with their hind parts downwards, by reafon of the forwardnefs 
of their wings. 
Web-footed fowl are various in their flight ; feveral have a 
failing or flagging wing, fuch as Gulls. Pinguins, and a An- 
gle Auk, are denied the power of flight. Wild-geese, in their 
migrations, do not fly pell-mell, but in a regular figure, in order 
to cut the air with greater eafe for example, in long lines, i$ 
the figure of a > or fome pointed form or letter, as the an- 
cients report that the Cranes aflumed, in their annual migra- 
tions, till their order was broken by ftorms. 
Strymona fic gelidum, bruma pellente, relinquunt, 
Poturas te, Nile, Grues, primoque volatu 
Effingunt varias, cafu monftrante, figuras, 
Mox ubi percuflit tenfas Notus altior alas. 
Confutes temere immiftse glomerantur in orbes, 
Et turbata perit difperfis litera * pennis, 
. * 
Struthious. 
Waders. 
Pinnated feet. 
Web-footeb; 
Y A A. 
C 2 
Lucan, lib. v. 1 . 7 1 r. 
Of 
