On June 24, 2017 was the Rouge National Urban Park's flagship bioblitz. I was a leader on a guided hike to teach participants about aquatic invertebrates, how to collect and identify them. We went to Little Rouge Creek and used dip nets to collect the invertebrates. The creek was fast following but we managed to sample along the sides of it and found many kinds of invertebrates including larval forms of Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies), invasive crayfish and water-penny beetles. The purpose of a bioblitz is to count all the species of animals, plants, fungi and lichen in a given area, usually a park or watershed, in 24 hours.