• Howard

    Definitely, Beech Blight Aphids.

  • Jim

    Definitely some type of wooly aphids. Not fungus.

  • Doug

    I think those are actually the beech blight aphid, an insect. You can find YouTube videos of these insects ‘dancing’, and a fact sheet at: http://extension.umass.edu/landscape/fact-sheets/beech-blight-aphid

  • Harold

    While these photos may appear to be of fungi, the photographer should have noticed that they were moving–and not simply blowing in the wind as their movements try to mimic. What you have here are really photos of Wooly Beech Aphids, which feed on the sap of Beech trees. They don’t do much damage and are really amazing creatures to see.