animal Bengal-tiger-variant big-cat breeding carnivore color colored colorful colors colour coloured colourful colours conservation contrast critically-endangered distinct distinctive felid hunter mammal movement moving pacing panthera-tigris protected protective prowling reclining rehabilitation relaxed relaxing resting Singapore-zoo striped sub-species swimmer tiger white white-tigers wildlife zoo black brown Camouflage camouflaged panthera-tigris-sumatrae Perth-zoo small smallest-tiger solitary Sumatran-tiger white-bearded cage caged cat feline jail cats ferocious mouth pet pharynx predator roar roaring savage scream shout teeth tongue tooth wild yawn "black and white" an cute fur kitten mask masquerade Africa danger landscape lion national park nature ngorongoro