WHERE SWALLOWS BOOST. 



239 



test, on account of the fact that the nests I have had 

 under observation have been cut out and taken away 

 before the female had begun to sit. 



That birds of different species will upon occasion 

 roost together we have proved by taking a Sparrow 

 and a Wren from the same hole in the end of a 

 haystack at night-time. 



FULLY-Fl-EDGED SWALLOWS SLEEPING IN OLD NEST. 



(Photographed by Magnesium Flashlight.) 



Swallows sleep on beams in barns where they 

 breed, and when molested flutter from one place to 

 another without making any serious attempt to 

 leave the building. 



We have examined sheds, however, in which 

 were nests full of large young ones without meet- 

 ing with a single old bird either on them or the 

 surrounding timbers. I have watched them go to 

 roost in Scotch firs and the branches of trees over- 

 hanging ponds ; and their going to rest in flocks 

 amongst the reeds growing on Thames eyots is 



