KEEL-BREASTED BIRDS. 283 
nest is generally built in a high tree, and resembles that of 
the robin. Some, however, develop a curious friendship 
for the fish hawk, and form their nests in among the in- 
terstices of its large abode, living there in the greatest har- 
mony. 
The Baltimore oriole (Zcterus ga/bula) is a familiar form 
throughout North America. The length is about seven 
and three quarter inches. They have singularly melodious 
voices, and are remarkable for their architectural abilities. 
Fic. 312.—Bobolink, or reed-bird. 
The nest is the combined work of male and female, and is 
hammock-shaped, swung from the branches, and made of 
threads of flax, silk-weed or cloth, horse-hair, and other 
material, the leaves of the trees forming a canopy over all. 
