Georgian graphic designer and illustrator George Bokhua has used the lightest artistic hand to capture the essence of certain animals. The series of illustrations are excitingly simple, conjured out of the emptiness of space but still clearly formed.
It is extremely difficult to create effective illustrations from negative space but Bokhua has cleverly utilized space to create this series.
Negative space, in art, is the space around and between the subject(s) of an image. Negative space may be most evident when the space around a subject, and not the subject itself, forms an interesting or artistically relevant shape, and such space is occasionally used to artistic effect as the “real” subject of an image. The use of negative space is a key element of artistic composition. Wikipedia
If negative space art interests you, check out PSFK’s article on Zek Crew’s street art created from negative space. Also, Bill Gardener created some logos for his LogoLounge series that used both positive and negative space to create hidden images that jump off the page once you find them.