From an interesting scientific study about animals’ appreciation of human art:
Pigeons can discriminate paintings by Monet from those by Picasso , paintings by Chagall from those by Van Gogh , and Japanese paintings from impressionist paintings . I have also shown discrimination of “good” and “bad” children’s paintings by pigeons  . These studies demonstrate that human visual art has discriminative and reinforcing properties in some birds. One similarity between humans and birds is their highly developed visual system, which may be the basis of such behavior.