Phaethon flavirostris

from The Collaborative International Dictionary of English v.0.48

Tropic \Trop"ic\, a.
   Of or pertaining to the tropics; tropical.
   [1913 Webster]

   {Tropic bird} (Zool.), any one of three species of oceanic
      belonging to the genus {Phaethon}, found chiefly in
      tropical seas. They are mostly white, and have two central
      tail feathers very long and slender. The yellow-billed
      tropic bird. {Phaethon flavirostris} (called also
      {boatswain}), is found on the Atlantic coast of America,
      and is common at the Bermudas, where it breeds.
      [1913 Webster]

from The Collaborative International Dictionary of English v.0.48

Egg-bird \Egg"-bird`\, n. (Zo["o]l.)
   A species of tern, esp. the sooty tern ({Sterna fuliginosa})
   of the West Indies. In the Bahama Islands the name is applied
   to the tropic bird, {Pha["e]thon flavirostris}.
   [1913 Webster]