Categories 3 Taxa
Pollution tolerant organisms can be in any quality water
Information on this page adapted from the Streamkeepers Handbook and Modules
19) Aquatic Worm
- 1/4 - 2", can be very tiny, thin worm-like body.
20) Midge Fly
Larva
- Up to 1/4", dark head, worm-like segmented body, 2 tiny legs on each side.
21) Blackfly
Larva
- Up to 1/4", one end of body wider. Black head, suction pad on end.
22) Leech
- 1/4 - 2", brown, slimy body, ends with suction pads.
23) Pouch Snail and Pond Snails
- No operculum. Breathe air. Shell usually opens on left.
24) Other Snails
- No operculum. Breathe air. Snail shell coils in one plane.
25) Planarium
- Flattened, unsegmented worm-like body, may have distinct eyespots, gliding movement.
26) Water Mite
- Looks like spider, may be very tiny, has 8 legs.
27) True Bug Adult
- Has short legs, swims and dives quickly.