|Some species are predators, leaf shredders, algal grazers,
and collectors of particles from the watercolumn .
3 - 15 mm.
8 - 40 mm.
Streams, rivers, lakes, ponds.
The larvae of many species use silk to make protective
cases of gravel, sand, twigs or other debris.
Caddisflies live several weeks and usually mate on
vegetation or rocks surrounding water. There is generally
one complete generation per year.