Its a bird.

From Today's Statesman:

Of birds and planes
Whose sky is it anyway?
Swimming came easily to man, maybe a flashback to a stage in his evolution, but flying was a different story. He just couldn’t emulate the feathered species and had to devise mechanical contraptions to get airborne. While on land it has long been a battle for “turf” between man and beast; it has been relatively less-so at sea ~ despite sharks, whales, and now sting-rays ~ and the sky would appear large enough for all winged creatures, natural or otherwise. Yet is that really so, for the original denizens of the blue yonder constitute a major hazard to aviation. Collisions between birds and planes, particularly the ingestion of a bird into a jet-engine spell disaster. No wonder there are constant calls for keeping the environs of airports clean, particularly to ensure that nothing attracts the larger carrion birds that soar at great heights and do not seem to be scared away by roar of a turbofan. No scientific study has been undertaken to assess how much birds resent such violation of their space. If humans are now complaining about the carbon footprint that aircraft trail, imagine how birds must be affected by the exhaust emissions that pollute their domain. So could it be that birds that dash themselves against planes are the equivalent of suicide-bombers? We will never know. Still, it is worth noting a non-violent, Gandhian if you prefer, protest at Israel’s Ben Gurion airport: a small bird flew in through the open door of an El Al plane and offered satyagraha in the cockpit. Refusing to move until trappers were summoned. The flight to Vienna was delayed, 178 passengers were off-loaded and left fuming in the terminal for hours. None of them would have appreciated the bird’s bid to recapture its “space”, but they would have to concede that a bird in the cockpit is not as unpleasant as what some Air India travellers once experienced at Mumbai ~ a rat in the cabin!