Albatross

/ˈalbəˌtrôs/

noun

a large bird with long, narrow wings found near the ocean, especially in the South Seas

At first it looked like a cross, then it looked like an aeroplane, then it looked like a kite, and at last with a whirring of wings it was right overhead and was an albatross.
– from The Voyage of the Dawn Treader, by C.S. Lewis