Still working oudoors in the zoo, and feeling more familiar with my models, I tried out to find suitable mediums to work with, and experimented with the BIC ballpoint pens now. I found the yellow one with its fine point ideal to depict textures like Fur, feathers and branches, as well to achieve the wished results working on gradualy changing shadow-tones . It was the begin of a new period of experiments , the "Ballpoint pen" period... A step forward in the development process..