Categories 2 Taxa
Somewhat pollution tolerant organisms can be in good or fair quality water
Information on this page adapted from the Streamkeepers Handbook and Modules
8) Crayfish
- Up to 6 inches, 2 large claws, 8 legs, resembles small lobster
9) Sowbug
- 1/4 - 3/4", grey oblong body higher than it is wide, more than 6 legs, long antennae
10) Scud
- 1/4", white to grey, body higher than it is wide, swims sideways, more than 6 legs, resembles small shrinp.
11) Alderfly
larvae
- 1" long, looks like small helgrammite but has 1 long, thin, branched tail at back end (no hooks). No gill tufts underneath.
12) Fishfly
Larva
- Up to 1 1/2", looks like small hellgrammite but often a lighter reddish-tan colour, or with yellowish streaks. No tuft gills underneath.
13) Damselfly
- 1/2 to 1", large eyes, 6 thin hooked legs, 3 broad oar-shaped tails, positioned like a tripod. Smooth (no gills) on side of lower half of body.
14) Watersnipe Fly Larva
- 1/4 - 1", pale to green, tapered body, many caterpillar-like legs, conical head, feathery "horns" at back end.
15) Crane Fly
- 1/3 - 2", milky, green, or light brown, plump caterpillar-like segmented body, 4 finger like lobes at back end.
16) Beetle Larva
- 1/4 - 1", light-coloured, 6 legs on upper half of body, feelers, antennae.
17) Dragon Fly
- 1/2 - 2", large eyes, 6 hooked legs on upper half of body, feelers and antennae.
18) Clam