VIREONIDAE 
VIREOS 
The Vireos are small insect-eating birds, yet 
larger than the warblers, with slender beaks and 
greenish gray plumage. They frequent the outer 
branches of deciduous trees, yet keep well hid- 
den among the leaves, singing as they work. 
Some of the species are good singers, all have 
a petulant call note like the word mzn-u-eet'. 
They build a neat cup-shaped nest, hung from 
a crotch in a twig. 
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