128 



IN BIRD-LAND 



rings ; but in the confusion to the eye caused by 

 such numbers, it is difficult to distinguish these 

 circles. When a certain height is reached they 

 again speed swiftly onward in a downward slanting 

 direction, and then, again skim over the surface of 

 the meadows. These performances are kept up 



NEST OF HOUSE-MARTIN. 



until dusk ; and then, retiring to the sallows and 

 willows bordering on the stream, the whole 

 company will retire to rest for the night. 



Owing to the fact that Swallows roost over 

 water, their numbers being increased by the flock- 

 ing together of the younger birds just before their 

 migration, persons ignorant of their habits, even 



