Red white and blue, Maple Leaf Galls

This is an interesting photo. It was the only leaf on the entire Maple tree that had these things on it. They're a tiny bug that works it's way between the layers of the leaf and sets up house bruising the leaf and causing it to deform into these very interesting colors.

http://jmichaeltracy.photoshelter.com/image/I0000ZwVyj.FjQeI