The New Zealand hydrobiosid caddis larvae have pincers on their forelegs. Hydrochorema larvae have a long white body and smallish orange or red head. The prosternal plate (shield-like plate between the forelegs) is relatively square and appears to have broken edges along the sides.
Hydrochorema larvae are common in stony streams and rivers, in bush covered and farmland areas.
They are predators, feeding on other stream invertebrates.
The presence of Hydrochorema larvae indicates good water quality, particularly where a range of mayfly and stonefly nymphs are also present. They have a tolerance value of 9 for hard bottom sites (there is no soft bottom tolerance value).