Abe from http://mybirdsblog.blogspot.com/ recently posted a picture of a northern parula. I saw it late after 16 people commented on it. To me it looks different. I went in my sibleys and really thought it looked like a female bay breasted. I could be totally wrong and thats why i am making this post below is the picture he took with my arrows on it.
ARROW 1- shows the white patches on the side of face. Seen on bay breasted warblers not parulas.
ARROW2- Shows the rufous colors below the face and there are some down the sides that most bay breasts have.
Parulas and bay breasted both have wing bars and female bay breasted have the eye ring making them hard to differ from parulas. The key feauture that stuck out was the white on the side of face. Notice abes and the two other bay breasted pictures have the white pale sides of face but the parula doesnt. Lets hope this is a bay breasted and Abe will have a new lifer bird!!