Stonefly larvae

• Found under stones and amongst debris.
• Finding stoneflies indicates good water quality.
• Predatory towards other insects and macroinvertibrates.
• Often found in riffles.

Stonefly adult

• Caddisfly larvae typically live at the bottom of flowing water in casings of debris and sediment.
• They east algae, plants, and microorganisms.
• Adults live for only a day or two.
• Larvae color can range from green and yellow to brown.
• Larvae tend to curl up when on a flat surface.

Caddisfly adult

Mayfly larvae

• Young mayfly nymphs live in fresh water and absorb oxygen from the water through gills.
• The adults fly.
• They are only found in very clean water containing lots of oxygen.
• They walk on the sediment and occasionally swim.
• They often hide under rocks.
• They are herbivores, eating plants and algae.

Damselfly larvae

• The damselfly nymph is longer and more slender than the dragonfly nymph and has a tail with 3 filaments, each of whihc contains the gills that allow the numph to breathe oxygen underwater.
• Very predacious.