Some birds such as crows, starlings, blackbirds and many buzzards aren't particularly colorful. Should we only relegate them to B&W and forgo the subtleties of what little colors they offer? I don't think it is necessary to show the color of a bird so widely known as a heron or really, even a peacock. I like challenging the imagination to see the color through a colorless veil. In this case, as Hugh points out, "it is the detail in the feathers, the capture of a full range of tonal values that makes this shot a success - at least for me....and, B&W are colors.