The flyers are captivating. They exist in clouds or clusters and are curious about me and so dance in and out of my light. I've seen them in highly different tunnels and rooms and on every level so I don't yet know where they reside. Maybe they have no special place but roam and roost at random.

They communicate with each other by making tinkling sounds quite like glass chips and beads moving against each other. Some clusters tend more toward a flute-like blend.
In case you didn't get enough of 3D meshes and solid models in the spatial adaptations section, here're a couple shots of the flyers' creation.

I was taking shots as fast as I could. A cluster appeared, and I got part of it; then one as they approached, and one as they rose and went on. It was over in a few seconds.