… on the underside of bark from a birch.
… on the underside of bark from a dead birch.
… on a gray day after an overnight rain .
… well, drops, actually, not bubbles.
… of the bark of an old, crumbling birch tree. This is an area about two inches across.
… at a friend’s house in Deerfield, New Hampshire.
… early this morning outside the front door of a friend’s home.