Benthic macroinvertebrates profoundly influence the aquatic ecosystem – their presence is an accurate measurement of stream health and water quality
Reveals for the first time the secret lives of macros such as mayflies, damselflies, midges, caddisflies and stoneflies Their transformation into winged adults when viewed from underwater is a marvel of grace and beauty Use with leaf pack experiments, stream ecology kit, MacroMania, aquatic macroinvertebrate identification and life cycle flashcards for a multimedia package Runtime: 35 minutes; 2007