The Singing- of Birds. E. P. Bicknell. 
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, 1S80) : 
but on the fall migration it is usually silent. 
Auk, 2, July, 1886. p. 26 ~&. 
