September Stream Science Classes at Audubon Naturalist Society


For 25 years, ANS has been teaching the natural history of aquatic ecology and training volunteer stream monitors who track the health of our region’s streams. Learn from the experts: study stream science in our introductory classes, and you just might be inspired to become a stream monitor yourself! Our advanced classes are perfect for those interested in deepening their knowledge about biological stream monitoring and are taught by our Maryland Biological Stream Survey-certified instructor Cathy Wiss. Our classes are great for fly fishermen, citizen science program or team leaders, aquatic resource biologists, and anyone interested in monitoring and understanding stream health.


Registration & Fee Information
Registration required. The classes are open to anyone 10 years and older. Prices for all classes are $15 Members/$25 non-members. Learn more and register at Contact with questions.



Introduction to Stream Science Series 
Classroom Session

Healthy Stream Biology
Section D: Thursday, September 20 (7-9:30 pm)

Woodend Sanctuary, Chevy Chase, MD
In the classroom, we will explore how “benthic macroinvertebrates” — organisms that live in the bottom of our streams – help us assess a stream’s health. We will learn how to identify these organisms to the taxonomic level of order through a PowerPoint presentation and by examining preserved specimens in a hands-on session with microscopes. 

Field Workshop

Section C: Saturday, September 22 (9:30 am – 12 pm)
Ten Mile Creek, Boyds, MD

In the field workshop, we will visit a healthy stream to practice monitoring techniques and to collect and identify the benthic macroinvertebrates we find.

Learn more and register at