I'm big on two different animal themes for decorating your room. Late 1800's-early 1900's African bush safari theme, and SouthEast Asian jungle theme.
The African bush safari theme is really neat and fairly easy to do. I get my ideas from watching movies set in that era, when wealthier people traveled down there to go on big game hunts(I hate the idea of big game hunts, but I'm talking purely about decor). You usually see a lot of light wicker chairs and furniture with white linens, accented by the occasional dark ebony piece. It has a very light, airy, comfy-safari lodge feel. Very stylish and easy to do. You can decorate with all your favorite African animals, and you usually find those in decorating pieces more than other region's animals. African Elephants, African Lions, Hippos, Zebras, Giraffes, Ostrich...lots of good choices there.
SouthEast Asian is very neat, tooo . It to me has a richer color scheme. Deep jewel tones in fabrics, rich reddish dark-ish woods for furniture. It has a very tropical feel with beautiful jungle plants. Certainly not as "airy" as the African theme, but it has a very exotic feel instead. Think of India or Thailand as inspirations. You can decorate with your Asian Elephants, Tigers, Crocodiles, beautiful birds, Asiatic Lions( a population does live in Asia) all sorts of tropical jungle species! This theme is perhaps my favorite, it has a great feel when you accomplish it.