YELLOW-BILLED CUCKOO 67 



After I had departed Mr. Caduc and his 

 friend Mr. Potter remained and saw it 

 take two short flights in the direction of the 

 Union Clubhouse and then a longer flight 

 down towards the Frog Pond. The dark- 

 ness of evening had then fallen upon the 

 Common. 



Mr. William Brewster in his "Birds of 

 the Cambridge Region" says: "Even that 

 densely populated part of Boston known as 

 the Back Bay district is now occasionally 

 invaded by these daring and adaptive little 

 owls ; Dr. Arthur P. Chadbourne tells me 

 that he heard one wailing in the trees on 

 Marlborough Street during the evening of 

 January 31, 1902, and late in December, 

 1903, my assistant, Mr. R. A. Gilbert, saw 

 another which had just been caught on the 

 doorstep of a house on Commonwealth 

 Avenue." 



15. YELLOW-BILLED CUCKOO 



Coccyzus americanus 



The song of this species of cuckoo came 

 several times distinctly to the ear in the 



