The isle was uninhabited; it was all green brush and white sand, set in transcendently blue water; even the coco-palms were rare, though some of these completed the bright harmony of colour by hanging out a fan of golden yellow. For long there was no sign of life beyond the vegetable, and no sound but the continuous grumble of the surf. In silence and desertion these fair shores slipped past, and were submerged and rose again with clumps of thicket from the sea. And then a bird or two appeared, hovering and crying; swiftly these became more numerous, and presently, looking ahead, we were aware of a vast effervescence of winged life. In this place the annular isle was mostly under water, carrying here and there on its submerged line a wooded islet. Over one of these the birds hung and flew with an incredible density like that of gnats or hiving bees; the mass flashed white and black, and heaved and quivered, and the screaming of the creatures rose over the voice of the surf in a shrill clattering whirr. As you descend some inland valley a not dissimilar sound announces the nearness of a mill and pouring river. Some stragglers, as I said, came to meet our approach; a few still hung about the ship as we departed. The crying died away, the last pair of wings was left behind, and once more the low shores of Kauehi streamed past our eyes in silence like a picture. I supposed at the time that the birds lived, like ants or citizens, concentred where we saw them. I have been told since (I know not if correctly) that the whole isle, or much of it, is similarly peopled; and that the effervescence at a single spot would be the mark of a boat's crew of egg-hunters from one of the neighbouring inhabited atolls. So that here at Kauehi, as the day before at Taiaro, the CASCO sailed by under the fire of unsuspected eyes. And one thing is surely true, that even on these ribbons of land an army might lie hid and no passing mariner divine its presence.
from In the South Seas by Robert Louis Stevenson