I saw an old booby, close by, raise his black-barred wings, and, flapping them, start to run across the sand. In this way he launched himself into the air and started out to sea. Presently I noticed several more flying away, one at a time, while others came sailing back again. How they could sail! They had the swift, graceful flight of a falcon.
For a while I puzzled over the significance of this outgoing and incoming. Shortly a bird soared overhead, circled with powerful sweep, and alighted within ten feet of me. The bird watched me with gray, unintelligent eyes. They were stupid, uncanny eyes, yet somehow so fixed and staring as to seem accusing. One of the little white balls of wool waddled up and, rubbing its fuzzy head against the booby, proclaimed the filial relation. After a few rubs and wabbles the young bird opened wide its bill and let out shrill cries. The mother bobbed up and down in evident consternation, walked away, came back, and with an eye on me plainly sought to pacify her fledgling. Suddenly she put her bill far down into the wide-open bill, effectually stifling the cries. Then the two boobies stood locked in amazing convulsions. The throat of the mother swelled, and a lump passed into and down the throat of the young bird. The puzzle of the flying boobies was solved in the startling realization that the mother had returned from the sea with a fish in her stomach and had disgorged it into the gullet of her offspring.
[Illustration: RABIHORCADO RISING FROM THEIR EGGS]
[Illustration: BOOBIES OF ISLA DE LA MUERTE IN THE CARIBBEAN SEA]
I watched this feat performed dozens of times, and at length scared a mother booby into withdrawing her bill and dropping a fish on the sand. It was a flying-fish fully ten inches long. I interrupted several little dinner-parties, and in each case found the disgorged fish to be of the flying species. The boobies flew ten, twenty miles out to the open sea for fish, while the innumerable shoals that lay around their island were alive with sardine and herring!
I had raised a tremendous row; so, leaving the boobies to quiet down, I made my way toward the flocks of _rabihorcados_. Here and there in the thick growth of green weed were boobies squatting on isolated nests. No sooner had I gotten close to the _rabihorcados_ than I made sure they were the far-famed frigate pelicans, or man-of-war birds. They were as tame as the boobies; as I walked among them many did not fly at all. Others rose with soft, swishing sound of great wings and floated in a circle, uttering deep-throated cries, not unlike the dismal croak of ravens. Perfectly built for the air, they were like feathers blown by a breeze. Light, thin, long, sharp, with enormous spread of wings, beautiful with the beauty of dead, blue-black sheen, and yet hideous, too, with their grisly necks and cruel, crooked beaks and vulture eyes, they were surely magnificent specimens of winged creation.