Winds on the Flight of Gulls and other Birds. 429 



the North Sea to Norfolk in spring, which is just what we 

 should expect, because in the months of April and May we 

 have not much west wind — see Mr. Preston's tables before 

 referred to. 



It may be laid down as a law that the direction of the 

 wind is the key to the movements, not only of Gulls, but of 

 all birds which migrate at a low altitude, and especially those 



Tracks of birds tivinj? ap:ainst a west wiud. 



which journey by day, such, for example, as Corvus cornix, 

 C. frugilegus, C. monedida, Alauda arvensis, Fringilla ccelehs, 

 Sturnus vulgaris, Scolopax rusticula, Accipiter nisus, and 

 Falco tinnunculus. These and many others in Norfolk, and 

 especially near the coast, prefer in autumn to go against the 

 wind if it is not too strong, and generally do so. The an- 

 nexed map will make my meaning more plain, as it shows 



SER. VII. VOL. I. 



H 



