african big big cats captive captivity cared-for carnivore cat enclosure fauna hunter lioness mammal Panthera leo powerful roam roaming roaming space social strong well-fed wild-life acinonyx jubatus distinctive fast fastest feline markings solitary speed animal big-cat breeding carnivorous color colored colorful colors colour coloured colourful colours conservation contrast critically-endangered felid panthera-leo reclining rehabilitation relaxed relaxing resting space striped wildlife zoo