A riddle to divine my name and nature, clues I have in store, I can be deep, I can be paw, these clues I give, do you need more? My name they use when things go wrong, I don't know who first said it, A disappearing act is a neat trick should I take credit? Horses or a bright red bird may make some think of me, My name they use when things go wrong, does that seem fair to thee? Half the world is mine and yet I do not need a crown, So why do people seem to think that I am lower down?
What am I?