156 



THE WORLD OF LIFE 



mosquitoes must be the chief support of the innumerable mil- 

 lions of young birds which have to be fed here, both passerine 

 and Avading birds. Of the former more than eighty species 

 are named, including seven buntings, four tits, two grosbeaks, 



Fig. 20. — Grey Plover's Nest and Young {8quatarola helvetica). 



six pipits, eleven warblers, five wagtails, two sparrows, three 

 woodpeckers, the beautiful Avaxwing, and a host of others, 

 many of which are among our common birds. What a delight 

 to them all must be this mish northward into a land of per- 

 petual daylight, swarming with the most nutritious food, fruits 

 and berries for the parents, inexhaustible clouds of mosquitoes 



