This week, my guest is educator and aquatic entomologist Anna Le [18:57], who introduces us to the amazing world of trout-stream invertebrates.  She tells us how to gauge the health of a river by looking at the bugs, and also how we can all be citizen scientists and alert the authorities when we see a decline of important indicator species.

 

In the Fly Box this week we have the usual mix of difficult and easy questions, plus tips,  including: