Animals are always a big subject for artists. You should know that drawing is a very interesting part of every living art object. This is also a strong mind. Drawing drawings needs a lot of detailed observations, other than that it is very difficult to go through the full detailed picture is a pencil sketch or maybe a color image. And the most important part is that the artist should be remembered about realistic things. a quieter pencil sketch is difficult because it's important depending on light shading.