Scientists put tiny backpacks on crayfish

This back to school season, U.S. Fish and Wildlife Service (FWS) biologists are testing out a backpack of their own. But this one doesn’t carry notebooks and pens. It tracks crayfish movements and survival.  View this post on Instagram
The trial is part of the FWS’ efforts to boost the populations of the Big Sandy crayfish (Cambarus callainus), a freshwater crustacean that lives in the rivers and streams of Appalachia. Since 2016, these four-inch long creatures have been conside