The Red Sweat of Hippos by Yoko Saikawa et al.: Within a few minutes of perspiration, the colorless, viscous sweat of the hippopotamus gradually turns red, and then brown as the pigment polymerizes and may act as both an antibiotic and sunscreen.
Lazy Black Panther by Charlie Burlingame A black panther is typically a melanistic color variant of any Panthera species. Black panthers in Asia and Africa are leopards (Panthera pardus). Black panthers in the Americas are black jaguars (Panthera onca)
Photographer Wim Van Dan Heever’s Images Capture Chases And Fights In The Animal Kingdom It’s difficult to tell whether this is a serious fight or just some fooling around by a pair of polar bears. (Wim van Den Heever / Mercury Press / The Daily Mail)