Another poor photograph of what seems to be a caseless caddis fly and a stonefly?
No interactions present.
Not sure what the "blobby" thing in the middle is, not enough detail. Possibly a caseless Caddis - Rhyacophilidae
The larvae on its side below it is a mayfly nymph, almost certainly Seratella (Ephemerella)ignita - the little pear shaped "worm" to the right is a Blackfly larva (Simulidae).
Tachinid Recording Scheme
TRS Facebook Page
Great stuff, thanks for that folks
Lat/Lng: 54.9309286, -1.7232831
OS grid ref: NZ178596
River Derwent at Warren's Haugh