Fond du Lac Reporter: Bird lovers may see a change in the feathered friends frequenting their backyard feeders if seasonal temperatures in Fond du Lac climb as predicted. At this point, it’s hard to measure whether that’s good news or bad, but it’s certainly a matter of adaptation, said well-known area wildlife educator Bill Volkert. A recently released warning from the National Audubon Society points to an alarming northward and inland movement of North American birds. The culprit? Global climate …