Always they fly, around and around, now flocking, now scattering.
Above the cities, they block out the skies.
Stand in the remotest desert and wait, and eventually you will see one.
A few have been seen even at the International Space Station.
They mostly drift aimlessly, but they can pace supersonic aircraft, and fly fast enough to evade any missile.
Always more, though none see where they come from.
Do they think? Do they feel?
Some say that when there are as many of them as there are of us, they will stop flying and dive, each to its target.