I just found out about a really neat project used to raise awareness and funding for endangered species: The Endangered Species Print Project.
The Endangered Species Print Project offers limited-edition art prints of critically endangered species. The number of prints available corresponds with the remaining animal or plant populations. For example, only 45 Amur Leopards remain in the wild, so for this edition, only 45 prints will ever be made. A different organization, whose mission is to the ensure the survival of the species depicted, is chosen for each print. 100% of the sales of ESPP prints are donated to these conservation organizations.
As both an artist and a biologist, I think this is an excellent idea. If your walls are looking a bit bland and you have a little extra money, consider contributing to this great cause. The also have a corresponding blog where you can keep up with information about endangered species.