This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
lincoln park zoo chicago illinois historic lincoln park zoo lincolnparkzoo commonseventcommonground bear animalia chordata mammalia carnivora caniformia ursidae mammal animal polar bear polarbear ursus maritimus ursusmaritimus ursus cage enclosure blackandwhite monochrome black and white Polar bear Ursus maritimus in cage at Lincoln