[Maine-birds] Unidentified Nest

Dear All

I found this nest at the side of a large pine at Lake St George State Park in Liberty, ME.

https://www.dropbox.com/s/5co6qoq7ciu4pqo/IMG_0896.jpeg

https://www.dropbox.com/s/w40lkxtow0efkbh/IMG_0894.jpeg

Diameter is 4in and depth is 2in. Outside is woven grasses and inside is lined with pine needles.

Anyone able to identify the maker?

Thanks

—mco