Four Mile CreekShipbuilders Creek

Mill Creek

March 2009

Macroinvertebrate Samples

We think this is a caddisfly.

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

macroinvertebrate?

This looks like a riffle beetle.

Check out this mayfly nymph!

This crayfish was about 10 cm long!

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

A few stonefly nymphs

looked like they were

getting wings!

Magnified View

Isopod & Stonefly Nymph

We always find lots of amphipods (scuds).

We aren’t sure what kind of

macroinvertebrate this is. It has lots

of legs, a segmented body,

and antenna.

Look at the colors on

this aquatic worm!

What new questions do you have about macroinvertebrates?