Yearling male American redstart. If it weren't singing out, I'd have thought it's a female redstart. Yearling males in their female-like plumage are often unsuccessful in attracting a mate and so continue to sing like this for a month or more.

---

Created by M.K.Ravishankar (mk_ravishankar@yahoo.com) on Sat Feb 16 17:16:13 2013