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Updated: May 27, 2025
Therefore wo must suppose either that all rodents, including the vizcacha, branched off from some ancient marsupial, which will naturally have been more or less intermediate in character with respect to all existing marsupials; or, that both lodents and marsupials branched off from a common progenitor. ... On either view we must suppose that the vizcacha has retained, by inheritance, more of the characters of its ancient progenitor than have other rodents."
A Vizcacha never enters another's burrow, and if by chance driven into one by dogs will emerge speedily, apparently finding that the danger within is greater than the danger without.
After this I gave up shooting them in disgust; it was dull sport, and to exterminate or frighten them away with a gun seemed an impossibility. It is a very unusual thing to eat the vizcacha, most people, and especially the gauchos, having a silly unaccountable prejudice against their flesh.
When the vizcacha has made his habitation, it is but a single burrow, with only himself for an inhabitant, perhaps for many months.
There are a few mammalians that live together in small communities, in a habitation made to last for many generations, in which such an instinct would appear necessary, and it accordingly exists, but is very imperfect. This is the case with the vizcacha, the large rodent of the pampas, which lives with its fellows, to the number of twenty or thirty, in a cluster of huge burrows.
Where there are large cakes of "tosca" near the surface, as in many localities on the southern pampas, the vizcacha makes its burrow as best he can, and without the regular trenches. In earths that crumble much, sand or gravel, he also works under great disadvantages.
Often after he has thus slain them, he leaves their bodies untouched for the Polyborus and vulture to feast on, so great a delight does he take in destroying life. The vizcacha falls an easy victim to this subtle creature; and it is not to be wondered at that it becomes wild to excess, and rare in regions hunted over by such an enemy, even when all other conditions are favourable to its increase.
That the vizcacha has comparatively no adverse conditions to war with wherever man is settled is evident when we consider its very slow rate of increase, and yet see them in such incalculable numbers. The female has but one litter in the year of two young, sometimes of three.
The Vizcacha lives in small communities of from twenty to thirty members, in a village of deep-chambered burrows, some twelve or fifteen in number, with large pit-like entrances closely grouped together, and as the Vizcachera, as this village is called, endures for an indefinitely long period, the earth which is constantly brought up forms an irregular mound thirty or forty feet in diameter, and from fifteen to thirty inches above the level of the road; this mound serves to protect the dwelling from floods on low ground.
There is nothing strange, I think, in the mere fact of the vizcacha being unable to work his way out when thus buried alive; for, for all I know to the contrary, other species may, when their burrows are well covered up, perish in the same manner; but it certainly is remarkable that other vizcachas should come from a distance to dig out those that are buried alive.
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