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yes it's a whirligig beetle larvae. also their cocoon is made out of mud. So i guess gigaboo can go next

Identify, plus its relevance to humans.

Blackfly, they transmit diseases like river blindness to humans. Is there any good way to tell these apart from horseflys?

Yes, good job. I think blackflies have different eyes and more bee or wasp-like bodies.

How specific should we study about what the macroinvertebrates indicate about the water quality? Just the classes? Or the oxygen level too?

wandahe wrote:How specific should we study about what the macroinvertebrates indicate about the water quality? Just the classes? Or the oxygen level too?

In Div.B we really only need to know pollution sensitivity (class), but that would be necessary in Div.C.

Okay give this one a try.

What does it eat and how does it breathe?

water scorpion, class 1, eats small invertebrates, sometimes fish, breathes via siphons

yup, all correct, it's your turn to post now.

Name, class, and life cycle stage (look carefully at this one)