Something at the top of the trees

[Sammie]

Recently looking out my window not focusing at anything I have accidentally begun to notice a very subtle movement of something looking like, energy or flies or pollen.
At first I thought flies, but the way these things move together is like a conscious being breathing and they are so connected and go in and out in a smooth motion. At first it was
only noticed on one tree, but now two of them. So far only the left top of the trees, it is incredible subtle which is why I noticed it when in a relaxed state of mind. Anyone who can
confirm what this is, I've eliminated flies as they are kind of yellowish and transparent and move in synchronicity like unaffected by gravity and wind.