Animals are not especially predictable subjects. They don’t hold still, and they won’t say cheese. Getting an interesting pose from a bird, a dog, or a monkey is a matter of patience; there just isn’t much you can do to speed up the process.
What you can do, however, is make sure that you have a great background for your photo. Generally speaking, simple backgrounds will help your subject stand out – so try to find a location or an angle that will give you a clean image. Then, when the critter finally does strike the perfect pose, your photo will show it in all its glory.