YELLOW-THROATED VIREO. 
175 
of recognition, 'prreaigh 'prreaigh. These syllables rise and 
fall in different tones as they are repeated, but though usually 
sweet and impressive, are delivered too slow and solemn to be 
generally pleasing. In other respects they considerably resem- 
ble the song of the Red-Eyed Warbling Flycatcher, in whose 
company it is often heard, blending its deep but languid 
warble with the loud, energetic notes of the latter ; and their 
united music, uttered during summer, even at noonday, is 
rendered peculiarly agreeable, as nearly all the songsters of 
the grove are now seeking a silent shelter from the sultry heat. 
In the warmest weather the lay of this bird is indeed peculiarly 
strong and lively ; and his usually long-drawn, almost plaintive 
notes, are now delivered in fine succession, with a peculiar 
echoing and impressive musical cadence, appearing like a 
romantic and tender revery of delight. The song, now almost 
incessant, heard from this roving sylvan minstrel is varied in 
bars nearly as follows: prca prcd prcoi, preait preoit p'rriweet 
preeai, pnvai praiou, precai preco praoit, preeo prcdwit preeao. 
When irritated, he utters a very loud and hoarse mewing 
pratgh praigh. As soon, however, as the warm weather begins 
to decline, and the business of incubation is finished, about 
the beginning of August, this sad and slow but interesting 
musician nearly ceases his song, a few feeble farewell notes 
only being heard to the first week in September. 
This species, like the rest of the genus, constructs a very 
beautiful pendulous nest about 3 inches deep and 2^^ in 
diameter. One, which I now more particularly describe, is 
suspended from the forked twig of an oak in the near neigh- 
borhood of a dwelling-house in the country. It is attached 
firmly all round the curving twigs by which it is supported ; 
the stoutest external materials or skeleton of the fabric is 
formed of interlaced folds of thin strips of red cedar bark, 
connected very intimately by coarse threads and small masses 
of the silk of spiders’ nests and of the cocoons of large moths. 
These threads are moistened by the glutinous saliva of the 
bird. Among these external materials are also blended fine 
blades of dry grass. The inside is thickly bedded with this 
