Students observed macroinvertebrate samples from local creeks to help determine water quality.

1. Four Mile Creek Shipbuilders Creek Mill Creek March 2009 Macroinvertebrate Samples

2. We think this is a caddisfly.

5. We have no idea what this is. Can anyone help identify this macroinvertebrate?

6. This looks like a riffle beetle.

7. Check out this mayfly nymph!

8. This crayfish was about 10 cm long!

9. Two tails, antenna, 3 pairs of legs – must be stonefly nymphs!

10. A few stonefly nymphs looked like they were getting wings! Magnified View

11. Isopod & Stonefly Nymph

12. We always find lots of amphipods (scuds).

13. We aren’t sure what kind of macroinvertebrate this is. It has lots of legs, a segmented body, and antenna.

14. Look at the colors on this aquatic worm!

15. What new questions do you have about macroinvertebrates?