104 



BIRD STUDIES WITH A CAMERA 



Swallows are not known to migrate by night, 

 and, so far as I ani aware, no single Swallow has 

 ever been foun<l among the thousands of night- 

 flying birds which have perished by striking light- 

 houses. The Swalhjws, therefore, when migrating 



Swallows KatlirriiiK liL'sliiij; niati-ruil. 



prol)ably leave the marsh during the day, but in 

 what manner who can say ? 



Several times when crossing the marslies on the 

 cai's I liavc (observed gatherings of Swallows which 

 niade the immens(! Hocks obsi'rveil daily in August 



