In Newton, MA (greater Boston) yesterday around 6:00pm this bird was flitting around the top branches of wooded area behind my house. Mostly deciduous but there is a large fir near where I saw it. I first thought it might be a wood peewee as it might have been bug hunting as it moved around, but it looks more like a warbler to me. There were 2 other birds up there that might have been companions. Can anyone identify this bird.