I'lIOTOdRAPHING BY FLASHLIGHT. 



247 



our observations upon House Sparrows incline us to 

 tliink tliat tliey sleep sounder in sunnner than in 

 winter ; for durin^- the former season they are easier 

 to approach and examine, with their heads buried in 

 their featliers, than in the latter. 



I think it will be found that the great majority 

 of birds sleep in similar situations to those in which 

 they have been bred ; however, there are many 

 notable exceptions to this rule. Pheasants are 

 hatched on the ground, and roost in trees — after 

 their aulumn moult at uny rate; Fieldfares nest in 

 trees, and often sleep upon the ground, as I have 

 proved again and again by Hushing them from bare 

 fields on dark winter nights. 



We have endeavoured to take photographs of 

 birds on their roosts in sunnner-time, but found it 

 impossible on account of the thick foliage. The 

 accompanying picture of a red undervving moth in 

 the act of sucking up an entomologist's rum and 

 treacle from the bark of a tree, however, shows 

 the possibilities of tlie magnesium flashlight. 



RED UNDERVVING MOTH. 



(Photographed by Magnesiitm Fla.iklUjht.) 



