americas apex-predator big-cat black-spots Camouflage carnivore carnivorous circles coat distinctive feline fur in-decline jaguar mammal near-threatened opportunistic panthera-onca pelt powerful-jaws relaxed rosettes solitary spots spotted sprawled-out stalk-and-ambush-predator stalker stalking stocky strongest-bite third-largest-feline zoo animal black breeding brown camouflaged color colored colorful colors colour coloured colourful colours conservation contrast critically-endangered felid hunter panthera-tigris-sumatrae Perth-zoo reclining rehabilitation relaxing resting small smallest-tiger striped sub-species Sumatran-tiger swimmer tiger white white-bearded wildlife Bengal-tiger-variant distinct movement moving pacing panthera-tigris protected protective prowling Singapore-zoo white-tigers