I think the canopies of our forests are one of the great unknowns.

Yeah, I think you are spot-on with this statement. It's very interesting that we have such a big problem with getting to the canopies, because we always learn something new when a scientists actually manages to get samples from it. I remember reading about a research group that sprayed the canopies with gases to make the insects fall to the ground, and they found that something like half of them were completely new to science. We also find a new mammal or bird every once in a while in the canopies ;)

Thanks for the comment!