Juvenile Savannah Sparrow?
I am thinking this little sparrow out on the Kennebunk Plains is a Savannah Sparrow, despite the lack of yellow in the eyebrow. Juvinile perhaps? Mostly I like the setting…the bird posted up on the old tree against the lovely bokeh of the field behind.
Sony Rx10iii at 600mm equivalent. Program mode, -.3 EV. 1/400th @ f4 @ ISO 100. Processed in Polarr.