“If I keep a green bough in my heart the singing bird will come.”
~ Chinese proverb
There are a number of Passeriformes (perching birds) called “warblers”. They are not particularly closely related, but share some characteristics, such as being fairly small, vocal and insectivorous. The two families of American “warblers” are part of another superfamily, which unites them with sparrows, buntings, finches, etc.
Dr Bill Wooten 