I'm a kind of beetle that lives among the stones in streams...
Beetles like me are called Elmids. When I am young, I am long
and skinny like in the photo. When I am an adult, I will be a shiny beetle.
We live in many different kinds of streams in New Zealand, and
we are very common in gravelly streams. Sometimes there are more of us than any
other kind of insects in the water. Lots of little fish eat Elmids so we have to
hide in the gravel. That might be why you haven't seen us in the water before.