Lego artist Jin Kei has created this Rhinoceros. It is a pretty clear statement about the current state of the species and its dwindling numbers due to poaching of their horns. But, like all artwork there are a lot of different interpretations about it.
What is neat is that this whole thing has been created by (mostly) using basic Lego pieces. The transparent bricks also do a good job of creating the appearance that the Rhino is dissolving into nothing.
There is more about this Lego Rhinoceros here: https://www.reddit.com/r/lego/comments/3uzyrb/rhinoceros_jin_kei/