Or they mimic other living things like crabs as seen here below
Artworks like this give me the same feeling as beautiful images like the spiders that have coated the trees in Pakistan in wake of the flooding, pictured below.
at any rate, go check out more of Rune Guneriussen at his website http://www.runeguneriussen.no/index.html
The only thing I wish I could change about his work is that, much like Andy Goldsworthy, the work they create is so remote it is usually only seen through photography. I would love to wander through the forest of lamps at night and see the colours shine of the snow. Can you imagine walking through a forest at night and seeing a light from afar, going to investigate, and finding that? I think it would be the same kind of magic that reading Narnia gave you when you were a kid.