![Psephenidae (water penny beetles)](https://stroudcenter.org/wp-content/uploads/2016/01/taxon43-300x240.jpg)
From Newsworks on WHYY-FM 90.9:
Turns out eight-year-olds aren’t the only ones who love great piles of leaves. Tara Muenz, education manager at Stroud Water Research Center in Avondale, loves them too. And so do the critters that help Muenz and other determine the health of the watershed: macroinvertebrates.