Any Ideas Appreciated

by Liz
(Lebanon County, Pennsylvania)

Hello!

I saw this bird on Saturday afternoon. Near a wooded area, (old growth), Pennsylvania, Lebanon County.

I think it is a warbler, it was small, between kinglet and sparrow size, but not sure of the markings. The dot on it's chest makes me believe it is a mourning warbler, but I don't know warblers that well, especially springtime. The yellow wingbars and yellow on the tail also throw me off with the dot on the chest and the idea that it might be a mourning warbler. I can't find anything closer. Help?