200 HOW TO STUDY BIRDS 



junco, tree sparrow, blue jay, and perhaps others that 

 I have overlooked. 



When it comes to snapshot work, by following 

 birds up with the camera in hand, the ordinary cam- 

 era may sometimes be successfully used in an emer- 

 gency by estimating the distance and using the scale 

 for focus, and the little finder. But for this work 

 the only satisfactory instrument is the reflecting cam- 

 era, the use of which will now be explained. 



