The Singing of Birds. E.P.Bickneii. 
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. 
