A high muddy stream doesn’t look like the most hospitable place for small aquatic insects - but they survive!

Large rocky substrate provides plenty of space for water to flow down below the stream bed, creating a unique habitat known as the hyporheic zone.

Millions of insects live one to many feet below the stream bed.  An unseen, but safe haven when floods occur.

Some Diptera larvae have solved the problem of hanging on in fast water by developing a row of suckers on their belly (Family: Blephariceridae)