2C6 Bicknell 071 the Singiiig of Birds. 



[July 



When singing is at its weakest, the song may be reduced to a 

 single low note, suggestive of a low note of the Yellow-bellied 

 Flycatcher. 



Empidonax flaviventris. # Yellow-bellied Flycatcher. 



I have heard the song-notes of this spring and fall migrant in 

 the last days of May, and once in mid-August (August 14, 1SS0) : 

 but on the fall migration it is usually silent. 



Empidonax acadicus. Small Green-crested Flycatcher. 



Continues in full note through June and into July. With me 

 its notes cease in the latter month, between the 5th and 20th, but 

 where the species is more abundant doubtless it may be heard 

 later. 



Since this went to the printer I learn from Dr. A. K. Fisher that 

 at Sing Sing, N. Y., where the bird is common, its notes con- 

 tinue nearly to the end of August, and probably even later. 



Empidonax trailli. Traill's Flycatcher. 



I hear this species only while it is passing north on its migra- 

 tion, when it sometimes tarries into June. 



Empidonax minimus. Least Flycatcher. 



.Silence comes earlier to this species than to almost any other of 

 our summer birds ; but where I have found this to be true is near 

 the southern limit of the bird's summer range, and it is not unlikely 

 that it has somewhat different habits of song further within the 

 area of its distribution. 



In some years I have missed its note after the last days of June, 

 and my latest date, July 20, is isolated in my record, the nearest 

 approaches to it being July 12 and £4. 



Trochilus colubris. Ruby-throated Hummingbird. 



The only sound I ever heard from this bird was an excited 

 chippering. My books show no record of this after the breeding 

 season. 



