Charley Harper was one of the most uniquely talented illustrators of the 20th century. From the 1950s up until his death in 2007, Harper created a seemingly endless amount of gorgeous posters and other illustrations depicting animals, plantlife, and other natural forms. Whereas many artists would put microscopic detail into their renderings of leaf veins and housefly eyeballs, Harper was more interested in the general geometric shapes of animals and plants, breaking them down to their most simple forms. He said he didn't count feathers, he counted wings.
In the 1980s and early 1990s, Charley Harper completed ten posters for the US National Park Service, each focusing in on a specific ecosystem and its inhabitants. Prints of some of these are available online. Ask your buddy Google for help.
If you're serious about wanting to see more of Harper's beautiful artwork, Todd Oldham compiled a fantastic and gigantic book (over 400 pages!!!) which was released last year. It is available through YouWorkForThem