Invasion of Ice Spiders

These ice crystals are interesting. They form when the temperature drops abruptly in the humid air adjacent to liquid water. Here, the brook was still flowing until a below-zero cold snap. The dark are of clear "black ice" was the last to freeze over, so it has fewer of the radial crystal arrays. I thought the progression from many to fewer crystals sort of implied motion, as if they were advancing into the darker area like a swarm of spiders or maybe crabs.

Canon 5DII
Canon 24-105
1/50 sec. @ f/13