158 THE BOOK OF MIGRATORY BIRDS 



as curlew and godwit, when much persecuted become 

 exceedingly wary, and fly high when crossing what they 

 know to be dangerous spots; but in the usual course of 

 things these birds, if unmolested, make their daily tidal 

 flights at no great height. Flying against a strong wind, 

 they merely skim the ground, only rising a little to take 

 the banks. 



