Animal Intelligence Part 30

[170] See _Descent of Man_, p. 452 _et seq._

[171] See Newton, _Ency. Brit._, art. 'Birds.'

[172] _Natural Selection_, pp. 232-3.

[173] _Phil. Trans._, vol. lxxviii., p. 221 _et seq._

[174] The young cuckoo is generally hatched first.

[175] Allusion is here made to the fact that the cuckoo lays her eggs at intervals of two or three days, and therefore that if all were incubated by the mother, they would hatch out at different times--a state of things which actually obtains in the case of the American cuckoo, whose nest contains eggs and young at the same time.

[176] It is worth while to observe, as bearing on this theory of the origin of this parasitic habit, that even non-parasitic birds occasionally deposit their eggs in nests of other birds. Thus, Professor A. Newton writes in his admirable essay on 'Birds' in the Encyclopaedia Britannica, 'Certain it is that some birds, whether by mistake or stupidity, do not unfrequently lay their eggs in the nests of others. It is within the knowledge of many that pheasants' eggs and partridges'

eggs are often laid in the same nest; and it is within the knowledge of the writer that gulls' eggs have been found in the nests of eider-ducks, and _vice versa_; that a redstart and a pied flycatcher will lay their eggs in the same convenient hole--the forest being rather deficient in such accommodation; that an owl and a duck will resort to the same nest-hole, set up by the scheming woodman for his own advantage; and that the starling, which constantly dispossesses the green woodp.e.c.k.e.r, sometimes discovers that the rightful heir of the domicile has to be brought up by the intruding tenant.'

[177] _Origin of Species_, p. 215.

[178] Tom. i., p. 130.

[179] See _Birds of India_, i., p. 21; _Pa.s.sions of Animals_, p. 60; _Fac. Men. des Ani._, tom. ii., p. 183; _Mind in Lower Animals_, vol.

ii., p. 96; and _Descent of Man_, p. 74.

[180] _Animal Biography_, vol. ii., p. 173.

[181] _Nature_, xx., p. 266.

[182] Vol. i., p. 216. See also _Descent of Man_, p. 80.

[183] Menault, _Wonders of Instinct_, p. 132.

[184] _Nat. on Amazons_, p. 177; _Anecdotes_, p. 135.

[185] _Gleanings_, vol. ii., p. 96.

[186] _Ibid._, p. 99.

[187] _Nature_, vol. xiii., p. 303.

[188] _Unbeaten Tracks in j.a.pan_, vol. ii, pp. 149-50.

[189] Smiles, _Life of Edward_, pp. 244-6.

CHAPTER XI.

MAMMALS.

I SHALL devote this chapter to the psychology of all the Mammalia which present any features of psychological interest, with the exception of the rodents, the elephant, the dog and cat tribe among Carnivora, and the Primates--all of which I shall reserve for separate treatment.

_Marsupials._

In the 'Transactions of the Linnean Society,' Major Mitch.e.l.l gives an interesting account of the structure reared by a small Australian marsupial (_Conilurus constructor_) for the purposes of defence against the dingo dog. It consists of a large pile of dry sticks and brushwood, 'big enough to make two or three good cart-loads.' Each stick and fragment is closely intertwined or woven with the rest, so that the whole forms a solid, compact ma.s.s. In the middle of this large structure is the nest of the animal.

The marsupials are as low in the scale of mammalian intelligence as they are in that of mammalian structure: so that, except the above, I have met with no fact connected with the psychology of this group that is worth quoting, except, perhaps, the following, which appears to show deliberation and decision on the part of the kangaroo. Jesse writes:--

A gentleman who had resided for several years in New South Wales related the following circ.u.mstance, which he a.s.sured me he had frequently witnessed while hunting the kangaroo: it furnishes a strong proof of the affection of that animal for her young, even when her own life has been placed in the most imminent danger. He informed me that, when a female kangaroo has been hard pressed by dogs, he has seen her, while she has been making her bounds, put her fore-paws into her pouch, take a young one from it, and then throw it as far on one side as she possibly could out of the way of the dogs. But for this manoeuvre her own life and that of her young one would have been sacrificed.

By getting rid of the latter she has frequently effected her escape, and probably returned afterwards to seek for her offspring.

_Cetaceans._

The following is quoted from Thompson:--

In 1811, says Mr. Scoresby, one of my harpooners struck a sucker, with the hope of leading to the capture of the mother. Presently she arose close to the 'fast boat,' and seizing the young one, dragged about 600 feet of line out of the boat with remarkable force and velocity. Again she rose to the surface, darted furiously to and fro, frequently stopped short or suddenly changed her direction, and gave every possible intimation of extreme agony. For a length of time she continued thus to act, though pursued closely by the boats; and, inspired with courage and resolution by her concern for her young, seemed regardless of the danger's which surrounded her. At length one of the boats approached so near that a harpoon was hove at her; it hit, but did not attach itself. A second harpoon was struck, but this also failed to penetrate; but a third was more successful, and held. Still she did not attempt to escape, but allowed other boats to approach; so that in a few minutes three more harpoons were fastened, and in the course of an hour afterwards she was killed.[190]

Mr. Saville Kent communicates an article to 'Nature' (vol. viii., p.

229) on 'Intellect of Porpoises.' He says:--

The keeper in charge of these interesting animals is now in the habit of summoning them to their meals by the call of a whistle; his approaching footsteps, even, cause great excitement in their movements... .

The curiosity attributed to these creatures, as ill.u.s.trated by the experiences of Mr. Matthew Williams, receives ample confirmation from their habits and confinement. A new arrival is at once subjected to the most importunate attention, and, advancing from familiarity to contempt if disapproved of, soon becomes the object of attack and persecution.

A few dog-fish (_Acanthias_ and _Mastelus_), three or four feet long, now fell victims to their tyranny, the porpoises seizing them by their tails, and swimming off with and shaking them in a manner scarcely conducive to their comfort or dignified appearance, reminding the spectator of a large dog worrying a rat... . On one occasion I witnessed the two _Cetacea_ acting evidently in concert against one of these unwieldy fish (skates), the latter swimming close to the top of the water, and seeking momentary respite from its relentless enemies by lifting its unfortunate caudal appendage high above its surface--the peculiar tail of the skate being the object of sport to the porpoises, which seized it in their mouths as a convenient handle whereby to pull the animal about, and worry it incessantly.

In a subsequent number of 'Nature' (vol. ix., p. 42) Mr. C. Fox writes:--

Several years ago a herd of porpoises was scattered by a net which I had got made to enclose some of them... .

The whole 'sculle' was much alarmed, and two were secured. I conclude that their companions retained a vivid remembrance of the sea-fight, as these _Cetacea_, although frequent visitants in this harbour (Falmouth) previously, and often watched for, were not seen in it again for two years or more.

_Horse and a.s.s._

The horse is not so intelligent an animal as any of the larger Carnivora, while among herbivorous quadrupeds his sagacity is greatly exceeded by that of the elephant, and in a lesser degree by that of his congener the a.s.s. On the other hand, his intelligence is a grade or two above that of perhaps any ruminant or other herbivorous quadruped.

The emotional life of this animal is remarkable, in that it appears to admit of undergoing a sudden transformation in the hands of the 'horse-tamer.' The celebrated results obtained by Rarey in this connection have since been repeated with more or less success by many persons in various parts of the world, and the 'method' appears to be in all cases essentially the same. The untamed and apparently untamable animal has its fore-leg or legs strapped up, is cast on its side and allowed to struggle for a while. It is then subjected to various manipulations, which, without necessarily causing pain, make the animal feel its helplessness and the mastery of the operator. The extraordinary fact is that, after having once felt this, the spirit or emotional life of the animal undergoes a complete and sudden change, so that from having been 'wild' it becomes 'tame.' In some cases there are subsequent relapses, but these are easily checked. Even the truly 'wild' horse from the prairie admits of being completely subdued in a marvellously short time by the Gauchos, who employ an essentially similar method, although the struggle is here much more fierce and prolonged.[191] The same may be said of the taming of wild elephants, although in this case the facts are not nearly so remarkable from a psychological point of view, seeing that the process of taming is so much more slow.

Another curious emotional feature in the horse is the liability of all the other mental faculties of the animal to become abandoned to that of terror. For I think I am right in saying that the horse is the only animal which, under the influence of fear, loses the possession of every other sense in one mad and mastering desire to run. With its entire mental life thus overwhelmed by the flood of a single emotion, the horse not only loses, as other animals lose, 'presence of mind,' or a due balance among the distinctively intellectual faculties, but even the avenues of special sense become stopped, so that the wholly demented animal may run headlong and at terrific speed against a stone wall. I have known a hare come to grief in a somewhat similar fas.h.i.+on when hotly pursued by a dog; this, however, was clearly owing to the hare looking behind instead of before, in a manner not, under the circ.u.mstances, unwise; but, as I have said, there is no animal except the horse whose whole psychology is thus liable to be completely dominated by a single emotion.

As for its other emotions, the horse is certainly an affectionate animal, pleased at being petted, jealous of companions receiving favour, greatly enjoying play with others of its kind, and also the sport of the hunting-field. Lastly, horses exhibit pride in a marked degree, as do also mules. Such animals, when well kept, are unmistakably pleased with gay trappings, so that 'in Spain, as a punishment for disobedience, it is usual to strip the animal of its gaudy coronal and bells, and to transfer them to another' (Thompson).

The memory of the horse is remarkably good, as almost every one must have had occasion to observe who has driven one over roads which the animal may have only once traversed a long time before. As showing the duration of memory I may quote the following letter to Mr. Darwin from the Rev. Rowland H. Wedgwood, which I find among the MSS. of the former:--

I want to tell you of an instance of long memory in a horse. I have just driven my pony down from London here, and though she has not been here for eight years, she remembered her way quite well, and made a bolt for the stables where I used to keep her.

A few instances of the display of intelligence by members of the horse tribe may bring this section to a close.