Who said you can't be whoever you want to be? You can be a leopard or a hummingbird, or both, you can be a zebra or a snake, you can have fur or you can have feathers, you can be small and colourful or big and gracious. You can be shy or you can be fearless. You may want to change, get out of the shell, or be comfortable and ready for a match.
I choose to use the animal skin/birdfeather as a metaphore to express diversity.