This close-up shot of a Blue Jay shows the beautiful pattern of their wings. I took this shot through a classroom window at school while I was waiting (in vain) for the white member of its flock to return.
According to sources I've read, blue-colored birds do not have blue feathers! The blue color comes from the refractive structures in the feathers, only the blue wavelength of the white light (from the sun) is reflected back to our eyes. A good discussion of feather color can be found on this link: Feather color