This bird is maybe a little smaller than a house finch.
CLOSED: Id Please - Eastern Shore of MD
This bird is an American Goldfinch female in her non-breeding, wintertime colors. You might be more familiar with them in their yellow breeding colors when the male is striking in his bright yellow with a black cap and the female is a paler yellow with no cap.
This link below is a great source of bird info. If you scroll down the page you'll see multiple pictures of Goldfinches at various times of the year.