I have no feet, yet help you roam, Through glassy lakes or rivers’ foam. I’m split in two, but still am whole, With steady strokes I guide your goal.

I bite the ocean floor, but never chew, clinging to earth beneath the blue. Though born of iron, I sleep in sand, holding giants with one hand.

A carpet of green, crisp and neat. Or an overgrown mess, full of weed. Sometimes small, sometimes wide. And always greener on the other side.

I come from high above, dark and with a magnet quality. I am said to have changed the world dramatically.

I'm grey-brown and small, the most common of them all. I'm threatened by urbanisation though, so please hear my woe. Feed me, shelter me, provide water to drink, lest I go extinct.