NATURE'S CAROL SINGERS. 



Another important 

 fact which aids decep- 

 tion when trying to im- 

 pose upon small birds 

 is that a Cuckoo's egg 

 is only one-quarter the 

 size of what might 

 reasonably be expected 

 from the dimensions of 

 its layer. It is much 

 heavier, however, than 

 any other egg of its 

 size, and has a thicker 

 shell. 



Competent natural- 

 ists have asserted that 



'COME AND HEAR THE 



CUCKOO SING, 

 COME AND BREATHE THE 

 BREATH OF SPRING." 



