*96 OFINSTINCT. SECT. XVf. 12. 



names. Ariftotle -fpeaking of the fwallows fays, 

 " They pafs into warmer climates in winter, if 

 fuch places are at no great diftance ; if they are, 

 they bury themfelves in .the climates where they 

 dwell," (8. Hift. c. 16. See alfo Derham's Phyf. 

 Theol. v. ii. p. 177.) 



Hence their emigrations cannot depend on a 

 necejjary inftincl:, asr the emigrations themfelves are 

 not mceffary ! 



2. When the weather becomes cold, the fwal- 

 lows in the neighbourhood aifemble in large flocks ; 

 that is, the unexperienced attend thofe that have 

 before experienced the journey they are about to 

 undertake : they are then feen fame times to hover 

 on the coaft, till there is calm weather, or a wind, 

 that fuits the direction of their flight, Other birds 

 of paflage have been drowned by thoufands in the 

 fea, or have fettled on (hips quite exhaufted with 

 fatigue. And others, either by miftaking their 

 courfe, or by diftrefs of weather, have arrived in 

 countries where they were never feen before, and 

 thus are evidently fubjec~l t to the fame hazards that 

 the human fpecies undergo, in the execution of their 

 artificial purpofes. 



3. The fame birds are emigrant from fome coun- 

 tries and not fo from others : the fwallows were feen 

 at Goree in January by an ingenious philofopher of 

 my acquaintance, and he was told that they conti- 

 nued there all the year; as the warmth of the cli- 

 mate was at all feafons fufficient for their own con- 

 flituiions, and for the production of the flies that 

 fupply them with nouriftiment. Herodotus fays, 

 that in Lybia, about the fprings of the Nile, tbe 

 fwallows continue all the year. (L. 2,) 



Quails (tetrao corturnix, Lin.) are birds of paflage 

 from the coalt of Barbary to Italy, and have fre- 

 quently fettled in large fhoals on (hips, fatigued 

 with their flight. (Hay, Wifdom of God, p. 129. 



Derharu 



