Now, the reasoning of those wonderful little creatures, in the face of new conditions, was perfectly obvious, (1) Finding themselves suddenly deprived of their winter home and store of food, (2) they scattered and fled for personal safety into the tall grass and sage-brush. (3) At night they assembled for a council at the ruins of their domicile and granary. (4) They decided that they must in all haste find a new home, close by, because (5) at all hazards their store of food must be saved, to avert starvation. (6) They explored the region around the tent and camp-fire, and (7) finally, as a last resort, they ventured to climb up the thills of the buggy. (8) After a full exploration of it they found that the box under the seat afforded the best winter shelter they had found. (9) At once they decided that it would do, and without a moment's delay or hesitation the whole party of five set to work carrying those seeds up the thills—a fearsome venture for a mouse—and (10) there before daybreak they deposited the entire lot of seeds. (11) Finding that a little time remained, they carried up the whole of their nest materials, made up the nest anew, and settled down within it for better or for worse.
Now, this is no effort of our imagination. It is a story of actual facts, all of which can be proven by three competent witnesses. How many human beings similarly dispossessed and robbed of home and stores, act with the same cool judgment, celerity and precision that those five tiny creatures then and there displayed?
The Wood Rat, Pack Rat, or Trading Rat. Although I have met this wonderful creature (Neotoma) in various places on its native soil, I will quote from another and perfectly reliable observer a sample narrative of its startling mental traits. At Oak Lodge, east coast of Florida, we lived for a time in the home of a pair of pack rats whose eccentric work was described to me by Mrs. C. F. Latham, as follows:
First they carried a lot of watermelon seeds from the ground floor upstairs, and hid them under a pillow on a bed. Then they took from the kitchen a tablespoonful of cucumber seeds and hid them in the pocket of a vest that hung upstairs on a nail. In one night they removed from box number one, eighty five pieces of bee-hive furniture, and hid them in another box. On the following night they deposited in box number one about two quarts of corn and oats.
Western frontiersmen and others who live in the land of the pack rat relate stories innumerable of the absurd but industrious doings of these eccentric creatures. The ways of the pack rat are so erratic that I find it impossible to figure out by any rules known to me the workings of their minds. Strange to say, they are not fiends and devils of malice and destruction like the brown rat of civilization, and on the whole it seems that the destruction of valuable property is not by any means a part of their plan. They have a passion for moving things. Their vagaries seem to be due chiefly to caprice, and an overwhelming desire to keep exceedingly busy. I think that the animal psychologists have lost much by so completely ignoring these brain-busy animals, and I hope that in the future they will receive the attention they deserve. Why experiment with stupid and nerveless white rats when pack rats are so cheap?
It was in the wonderland that on the map is labeled "Arizona" that I met some astonishing evidences of the defensive reasoning power of the pack rat. In the Sonoran Desert, where for arid reasons the clumps of creosote bushes and salt bushes stand from four to six feet apart, the bare level ground between clumps affords smooth and easy hunting-grounds for coyotes, foxes and badgers, saying nothing of the hawks and owls.
Now, a burrow in sandy ground is often a poor fortress; and the dropping spine-clad joints of the tree choyas long ago suggested better defenses. In many places we saw the entrance of pack rat burrows defended by two bushels of spiny choya joints and sticks arranged in a compact mound-like mass. In view of the virtue in those deadly spines, any predatory mammal or bird would hesitate long before tackling a bushel of solid joints to dig through it to the mouth of a burrow.
Did those little animals collect and place those joints because of their defensive stickers,—with deliberate forethought and intention? Let us see.
In the grounds of the Desert Botanical Laboratory, in November 1907, we found the answer to this question, so plainly spread before us that even the dullest man can not ignore it, nor the most skeptical dispute it. We found some pack rat runways and burrow entrances so elaborately laid out and so well defended by choya joints that we may well call the ensemble a fortress. On the spot I made a very good map of it, which is presented on page 164. [Footnote: From "Camp-Fires on Desert and Lava" (Scribner's) page 304.] The animal that made it was the White-Throated Pack Rat (Neotoma albigula). The fortress consisted of several burrow entrances, the roads leading to which were defended by carefully constructed barriers of cactus joints full of spines.
The habitants had chosen to locate their fortress between a large creosote bush and a tree-choya cactus (Opuntia fulgida) that grew on bare ground, twelve feet apart. When away from home and in danger, the pack rats evidently fled for safety to one or the other of those outposts. Between them the four entrance holes, then in use, went down into the earth; and there were also four abandoned holes.