In consequence of this derivation, several writers have thought that the Shâlâk might be the Solan goose, or gannet, a bird which lives on fish, and always takes its prey by darting down upon it from a height. This bird, however, although it certainly answers completely to the sense of the word shâlâk, is not common enough on the shores of Palestine to be specially mentioned among the unclean birds. Other writers, seeing this difficulty, have thought that the Shâlâk might be one of the terns, or sea-swallows, forgetful of the fact that these are not plunging birds, although exceedingly swift of flight.

Weighing, however, the opinions of the various Hebraists and naturalists, we may safely determine that the word shâlâk has been rightly translated in the Authorized Version. The Hebrew Bible gives the same reading, and does not affix the mark of doubt to the word, though there are very few of the long list of animals in Lev. xi. and Deut. xiv. which are not either distinguished by the mark of doubt, or, like the Tinshemeth, are left untranslated.

The Cormorant belongs to the family of the pelicans, the relationship between them being evident to the most unpractised eye; and the whole structure of the bird shows its admirable adaptation for the life which it leads.

Its long beak enables it to seize even a large fish, while the hook at the end prevents the slippery prey from escaping. The long snake-like neck gives the bird the power of darting its beak with great rapidity, and at the same time allows it to seize prey immediately to the right or left of its course. Its strong, closely-feathered wings enable it to fly with tolerable speed, while at the same time they can be closed so tightly to the body that they do not hinder the progress of the bird through the water; while the tail serves equally when spread to direct its course through the air, and when partially or entirely closed to act as a rudder in the water. Lastly, its short powerful legs, with their broadly-webbed feet, act as paddles, by which the bird urges itself through the water with such wonderful speed that it can overtake and secure the fishes even in their own element. Besides these outward characteristics, we find that the bird is able to make a very long stay under water, the lungs being adapted so as to contain a wonderful amount of air.

The method of catching prey which is practised by the Cormorant is familiar to us from the fact that the Cormorant has been trained to play the same part in the water as the falcon in the air, and has been taught to catch fish, and bring them ashore for its master. So adroit are they, that if one of them should catch a fish which is too heavy for it another bird will come to its assistance, and the two together will bring the struggling prey to land. Trained birds of this description have been employed in China from time immemorial, and in later years they have been re-introduced into England, where they have often exhibited their really wonderful powers.

In the days of Charles I. these birds were kept in training, and there was attached to the Court a professed official, called the Kings Master of the Cormorants. These birds were usually caught and trained in Holland, and thence exported to England. The disturbed state of the country during the civil wars, added to the sport-destroying character of the Puritans, seems to have caused the sport to be abandoned in this country, and it is only within the last few years that they have been again employed. In order to prevent it from swallowing the fish which it takes, each bird has a ring or ligature passed round its neck.

The Cormorant is a most voracious bird, swallowing a considerable weight of fish at a meal, and digesting them so rapidly that it is soon ready for another supply. Although it is essentially a marine bird, hunger often takes it inland, especially to places where are lakes or large rivers. Mr. Waterton mentions, in his "Essays on Natural History," that the Cormorants often visited the lake at Walton Hall, and that they soon became so familiar and fearless, that after catching and eating their prey they would sit on the terrace and preen their feathers under the windows of the drawing-room.

The lake is by no means a large one, and it is probable that the birds were attracted by the absolute security which was felt by every winged creature within the domain. "His skill in diving," writes Mr. Waterton, "is most admirable, and his success beyond belief. You may know him at a distance, among a thousand water-fowl, by his upright neck, by his body being apparently half immersed in the water, and by his being perpetually in motion when not on land.

"While the ducks and teal and widgeons are stationary on the pool, the cormorant is seen swimming to and fro, as if in quest of something. First raising his body nearly perpendicular, down he plunges into the deep, and, after staying there a considerable time, he is sure to bring up a fish, which he invariably swallows head foremost. Sometimes half an hour elapses before he can manage to accommodate a large eel quietly in his stomach.

"You see him straining violently with repeated efforts to gulp it; and when you fancy that the slippery mouthful is successfully disposed of, all on a sudden the eel retrogrades upwards from its dismal sepulchre, struggling violently to escape. The cormorant swallows it again, and up again it comes, and shows its tail a foot or more out of its destroyer's mouth. At length, worn out with ineffectual writhings and slidings, the eel is gulped down into the cormorant's stomach for the last time, there to meet its dreaded and inevitable fate."