Jaguar

First of all, you got a wonderful piece of art here! Congratz!

Well, I can say you used your media very well, the animal is painted in a way I can consider almost perfection. The shading, the colors are very well chosen/matched.
The expression in its eyes is amazing, but I'd chose another color to paint them, because they are a little bit "lost" in the drawing.
The environment is good, aswell.
Another thing I'd like to point out is the fur; you could have given the fur its texture, it seems to have a homogeneous texture, it's not that realistic.

Despite those points I figured out, the painting is very good! As I said, almost perfect!