i8 BIRDS OF THE 



which will be within the Garden on that 

 day. 



In evidence of night migration is the 

 repeated fact that, when at the close of the 

 day a survey of the grounds has revealed 

 the bird-life which is present, the round 

 the next morning at the opening of the day 

 shows the presence of birds not present the 

 evening previous, — sometimes a host, but, 

 whether many or few, it is clear that they 

 have come in the night and are beginning 

 the day in this new sojourning-place. More- 

 over, the chips and tseets of passing small 

 birds may be heard on quiet evenings in 

 migration time by sensitive listeners. And 

 keepers of lighthouses testify to the flights 

 of birds by night, being witnesses of their 

 striking against the lighted lanterns. 



Sometimes there is a very varied and 

 large collection of migrants in the Garden 

 when the country is not found to be so well 

 occupied. This suggests that the bright 

 lights of the city attract the birds in their 

 onward flight by night and induce many to 

 stop, thus securing to an area like the Gar- 



