(VA) (Fairfax County Parks) Explore Walney Creek with a naturalist to meet some of the small creek critters (macroinvertebrates) that call it home. Learn why so many different types of macroinvertebrates are active in winter streams. The naturalist will demonstrate winter collecting and participants can help pick, sort and learn to identify these magnificent critters. Ages 8 to Adult.

More Fairfax County Parks nature events can be found here.