The Singing of Birds. E.P.Biokneli. 
Hirundo bicolor. White-bellied Swallow. 
The song of this Swallow is hardly more than a chatter. This 
is to be heard as late in the year as the bird is with us. Its ordi- 
nary notes are less sharp and rapid than those of the Barn Swallow. 
Auk, I, Oot., 1884. p. 32 5 '. 
Song of the White-bellied Swallow ( Iridofrocne bicolor ). — I 
have seen no account of the song of this species, nor, indeed, was I aware 
of its musical powers until the past summer. May 24, at an elevation of 
8000 feet, I found a little colony just beginning house-keeping in a cotton- 
wood grove on an island in the San Antonio River, Colorado. When at 
rest they uttered a peculiar chirrupy warble, bearing resemblance to a 
Sparrow’s song in some respects, and strikingly like a Robin’s in some of 
the half whistles. 
The species breeds as high as 10,000 feet, and, I believe, always in trees. 
— F. M. Drew, Howardsville , Colora&nll N.O.O. a, April, 1881, p, //S* 
