Why don't fish have legs? And why don't birds have little hands? And now that we're at it, why don't humans lay eggs?

I dance on the wind above the foam, My cries are sharp where ships call home. I steal your chips with daring grace, And circle skies by the harbor’s face. What am I?

Guarded by spikes, I dance in the breeze. My purple crown attracts the bees. Want to pick me? Be careful, I bite. I'm prickly and won't go down without a fight.

Always there, within your sight Never reaching, despite your fight What am I, just out of reach As you stand alone, on the beach

I have six legs but cannot walk fast, I live in a hill that is built to last. I march in a line, I’m tiny and black, I carry a crumb on my sturdy back. What am I