The floor of the Hoffer Brook culvert under the A10 was absolutely covered in these small life forms - with the young Chabot Bullhead (Cottus perifretum) for scale - which I've never seen before. Could they be the larvae of Ephydra shore/brine flies @[email protected]? #riverflies #diptera 8/23

Plenty caddisfly (Trichoptera) larvae in the few silt free reaches of Hoffer Brook, esp. Brown Sedge (Anabolia nervosa), incorporating sticks in their cases to avoid being eaten by trout. Is the mosaic case of Silver Sedge (Odontocerum albicorne)? Diaphanous material also caddis? #riverflies 9/23