warbling vireo

Indeed, this warbling vireo seems to be the connecting link between them.

He resembles somewhat the Warbling Vireo (Vireo gilvus), and the two birds are often confounded by careless observers.

The warbling vireo has a stronger, louder strain, more continuous, but not quite so sweet.

He resembles somewhat the warbling vireo, and the two birds are often confounded by careless observers.

The warbling vireo is admirably named; there is no one of our birds that can more properly be said to warble.