I found these bits of fluff in the web of a tiny spider (possibly seen at left) that persistently builds an orb web between the outside rear-view mirror and the door of my car and took them for flying seeds. But as I looked at them even closer, they all seemed to have legs sticking out from the fluff. And there were the bluish filaments along the webbing. Wooly adelgids have about killed off the hemlocks, our state tree, so I certainly don't want to celebrate them. Now I see a couple of posts of wooly aphids by people who should know that show similar bluish filaments around them on leaves. Did my spider save a branch or so of a hemlock?