from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a tropical bird, Phaeton oethereus, often found far from land, whose cry resembles the whistle of a boatswain's pipe
Sorry, no etymologies found.
The name "boatswain-bird" is applied to some other kinds of birds, besides the tropic bird.
It was not unbroken by sounds; but these were of a character to sadden rather than cheer them, for they were sounds to be heard only in the wilderness of the great deep, -- such as the half-screaming laugh of the sea-mew, and the wild whistle of the boatswain-bird.
In that morning he says that a white bird was seen which has not the habit of sleeping on the sea, called _rabo de junco_ (boatswain-bird). [