Giraffes on brown paper

This is a study of two giraffes in the zoo of Leipzig. I was there with friends and we drawed animals there and I'd chosen the giraffes.
The crazy thing in drawing alive animals and not something from photograph, is, that the animals dont want to stand still on one place... They were running around and playing and rotating and so on.... That makes me fuzzy...but it's interesting and exciting to try it every time