During May 2009 there were several storms and several inches of rain. This rain primed the springs. When this happens and as the flow of ground water increases, so does the turbidity of the water. Rainbow Spring (aka; Double Spring) take on a pretty blue hue until it clears again in a few weeks.
Crop from long lens at, estimated 130 feet, from center of main field to the walnut trees along the river. Using 840-mm Canon lens (EF600L + 1.4 TC) on a Canon 1DS MKII. These woodpeckers are very common year round at ROLF.
My favorite bird; active pretty, feisty, and never stops moving. He nests 75 feet up old hickory or walnut trees. If you are not in the Tree Top Loft or the Log Lookout you will not have much of a chance to see or photograph one. Preferably in April-May.