Question about Downy Woodpeckers?

Sorry to put this in pets, but not sure where else it goes.. Anyway i commonly have downy woodpeckers at my feeders but lately have notice a bird that looks just like a downy, but its dk. brown and black, not white and black. I would like to know, is this a juvenile downy? or is there another type of similar woodpecker? I have pictures if anyone needs. thanks :)