The black bear (Ursus americanus) is a medium-sized bear native to North America. It is the continent's smallest and most widely distributed bear species. Black bears are omnivores with their diets varying greatly depending on season and location.
14 week-old twin polar bear cubs play during their first presentation to the media in Hellabrunn zoo on March 2014 in Munich, Germany. The male and female twins were born on December 2013 in the zoo. (Photo by Alexandra Beier/Getty Images)