Chironomids
The upper river below Lake Rotoiti is steadier and a fine large-river fishery; downstream it gathers serious West Coast rain and can blow out fast. The whole catchment fishes by spate timing: wait for the river to fall and clear toward normal, then fish the runs and pool tails.
The Buller / Kawatiri leaves Lake Rotoiti and gathers the rain of the Nelson and West Coast ranges into a long, powerful river running west through bush-clad gorges to the Tasman Sea at Westport. Big brown trout hold in its boulder runs and green pools, in a high-rainfall country where the river can rise and fall dramatically.
Wading: Powerful big water, fast rises after rain, slick boulders — serious wading care
Practical guides point to green beetles in early summer and cicadas from late summer on the upper and middle river — useful working guidance, but drawn from secondary fishing-guide sources rather than published monitoring.
- River
- Granite
- Confined
- Large river
- Gorge