Join the Natural History Society of Maryland to discover the underwater world of macroinvertebrates.  See them up close. Learning how they help indicate stream health, and what roles they play in stream ecology. NHSM volunteers will show participants how to catch and identify macroinvertebrates. Suitable for ages 6 and up. All equipment will be provided. Dress for the weather and prepare to get wet and muddy.

Macroinvertebrates are organisms that are large (macro) enough to be seen with the naked eye and lack a backbone (invertebrate). They inhabit all types of running waters, from fast-flowing mountain streams to slow-moving muddy rivers. Examples of aquatic macroinvertebrates include insects (in their adult, larval, or nymph forms), mollusks, crustaceans, and worms (Viklund, 2011). 

Free, but please RSVP for planning purposes. Donations (to NHSM) are accepted and much appreciated.  Go to the NHSM website to register.  

Stream Days will take place on fourth Sunday of June, July and August from 12-2.