A call of vireos seems like a decent name, but this is one family of birds that also has some collective nouns for a particular species, including a hangover of Red-eyed Vireos!!! Awesomeness from the collective noun peeps on that one. Bell’s Vireos gets great names too with a peal and a tintinnabulation. WOOT!
From Wikipedia
The vireos ( /ˈvɪri.oʊz/) make up a family, Vireonidae, of small to medium-sized passerine birds (mostly) restricted to the New World. They are typically dull-plumaged and greenish in color, the smaller species resembling wood warblers apart from their heavier bills. They range in size from the Choco Vireo, Dwarf Vireo and Lesser Greenlet, all at around 10 centimeters and 8 grams, to the peppershrikes and shrike-vireos at up to 17 centimeters and 40 grams (Forshaw & Parkes 1991).
From My Portfolio of Vireos
Clicking the image will take you to my portfolio where you can see all of my vireo images.