Grains, s. The husks of malt exhausted in brewing; the prongs of a fish-spear.
Gralla, s. That order of birds which Linnæus classifies as having obtuse bills, and long legs, as the crane, stork, &c.
Graminivorous, a. Grass-eating.
Granivorous, a. Eating grain.
Granivorous birds.—Birds may be distinguished, like quadrupeds, into two kinds or classes—granivorous and carnivorous; like quadrupeds, too, there are some that hold a middle nature, and partake of both. Granivorous birds are furnished with larger intestines, and proportionally longer, than those of the carnivorous kind. Their food, which consists of grain of various sorts, is conveyed whole and entire into the first stomach or craw, where it undergoes a partial dilution by a liquor, secreted from the glands, and spread over its surface; it is then received into another species of stomach, where it is further diluted; after which it is transmitted into the gizzard, or true stomach, consisting of two very strong muscles, covered externally with a tendinous substance, and lined with a thick membrane of prodigious power and strength; in this place the food is completely triturated, and rendered fit for the operation of the gastric juices. The extraordinary powers of the gizzard in comminuting the food, so as to prepare it for digestion, would exceed all credibility, were they not supported by incontrovertible facts, founded upon experiments.
In order to ascertain the strength of these stomachs, the ingenious Spallanzani made the following curious and very interesting experiments:—
Tin tubes, full of grain, were forced into the stomachs of turkeys, and after remaining twenty hours, were found to be broken, compressed, and distorted in the most irregular manner.
In proceeding further, the same author relates, that the stomach of a cock, in the space of twenty-four hours, broke off the angles of a piece of rough jagged glass, and upon examining the gizzard, no wound or laceration appeared.
Twelve strong needles were firmly fixed in a ball of lead, the points of which projected about a quarter of an inch from the surface; thus armed, it was covered with a case of paper, and forced down the throat of a turkey; the bird retained it a day and a half, without showing the least symptom of uneasiness; the points of all the needles were broken off close to the surface of the ball, except two or three, of which the stumps projected a little. The same author relates another experiment, seemingly still more cruel; he fixed twelve small lancets, very sharp, in a similar ball of lead, which was given in the same manner to a turkey cock, and left eight hours in the stomach; at the expiration of which the organ was opened but nothing appeared except the naked ball, the twelve lancets having been broken to pieces, the stomach remaining perfectly sound and entire. From these curious and well-attested facts we may conclude, that the stones so often found in the stomachs of many of the feathered tribes, are highly useful in comminuting grain and other hard substances which constitute their food.
Granivorous birds partake much of the nature and disposition of herbivorous quadrupeds. In both the number of their stomachs, the length and capacity of their intestines, and the quality of their food, they are very similar; they are likewise both distinguished by the gentleness of their tempers and manners. Contented with the seeds of plants, with fruits, insects, and worms, their chief attention is directed to procuring food, hatching and rearing their offspring, and avoiding the snares of men, and the attacks of birds of prey, and other rapacious animals. They are a mild and gentle race, and are in general so tractable as easily to be domesticated.—Bewick.