37 



The most important thing next to the characteristic slope of the 

 opening at an angle of 4 degrees is undoubtedly the jDointed oval form of 

 the trough. Strange to say, this most important circumstance is 

 frequently misunderstood. A mistake of this kind, such as speaking 

 of a flat trough, can only be the result of insufficient acquaintance 

 with the Berlepsch nesting-boxes.* (See p. 32. ~i 







,'a 





A. 



EXTERIORS OP BERLEPSCH S NESTING-BOXES. 



A. — With entrance hole opposite batten. 

 B. — With entrance hole at the side. 



The cover and the batten consist of oak | inch thick, and, as the 

 illustration shows, the former is fastened to the box by screw bolts. 

 The batten is provided with a hole for a nail above and below the box. 



* In one of the first editions of the " Gesammte Vogelschutz " the word " flat " 

 was wrongly printed for " pointed " trough. We must assume that this mistake 

 was copied by those who were not acquainted with woodpecker holes, and that 

 the error was thus spread. 



