A flock of Lesser Goldfinch just flew into the tree outside the large library window. There’s another flock in the tree ten feet beyond it. The birds look like leaves bouncing in a breeze and won’t be still for a moment. Whoops. Now they are still like the leaves when the air is still. Or have they flown away? A third flock zips in to join them and they are lively again. There must be at least thirty. Did they…..