Juvi Northern Mockingbird (Mimuspolyglottos)

Took this photo this AM at Saratoga Battlefield Park but had trouble ID'ing it. Thought Mockingbird at first but didn't seem to have the right markings or coloring but posted a pic on local bird club site and 3 other folks said juvi Mockingbird so guess I will go with that as there isn't really anything else in our area that matches. I hate when I get a clear photo of a bird but get it home and still can't match it up with my books. Luckly there are others I can turn to with better skills than mine.