Indeed, there is more to a nigger than just the black skin color that warns others of evil. Niggers can be identified by their stupidity, stench, laziness, lack of verbal communication skills, violence, drug use, preference for chicken, watermelon, purple drank, Newport cigarettes and colt 45 malt liquor. Also the overactive preoccupation with muh-k/muh-poozie.
Notice the niggers in these photos have white skin but are still identifiable as niggers by their flattened wide shovel noses, large boot lips, heavy boned jaws and heavy protruding bony brow ridges. Also note the hair is naturally a wiry Brillo pad texture unless artificially straightened and the look in the eyes have a dull and dead appearance. They are not winning any beauty contests.
Your observation that niggers do not look just like humans even if they have white skin is correct. In fact they look even more ugly and freakish. You can also bet these niggers are just as disgusting and violent as any other niggers.