- Submitted by:
- Submitted: Jun 16, 2018
- Photographed: Jun 16, 2018
- Spider: Unidentified
- Location: Downers Grove, Illinois, United States
- Spotted Outdoors: Man-made structure (building wall, fences, etc.),Ground layer (leaf litter, dirt, grass, etc)
- Found in web?: No
- Attributes:
I thought that someone came and mysteriously left two piles of blue sand on our deck an concrete nearby. For what it is worth, we had a rain last night and recently (two weeks ago) stained the deck. when i took a stick and ran it through the middle of one of the swarms, it moved like sand, but as i got closer, i could see that they were alive and moving. as the sun came up more, i could see that they were flying above the blue patch. what in the world are these?