Confining Our View To South America, We Should Certainly
Be Tempted To Believe That Trees Flourished Only Under A Very
Humid Climate; For The Limit Of The Forest-Land Follows, In A
Most Remarkable Manner, That Of The Damp Winds.
In the
southern part of the continent, where the western gales,
charged with moisture from the Pacific, prevail, every island
on the broken west coast, from lat.
38 degs. to the extreme
point of Tierra del Fuego, is densely covered by impenetrable
forests. On the eastern side of the Cordillera, over the same
extent of latitude, where a blue sky and a fine climate prove
that the atmosphere has been deprived of its moisture by
passing over the mountains, the arid plains of Patagonia
support a most scanty vegetation. In the more northern
parts of the continent, within the limits of the constant
south-eastern trade-wind, the eastern side is ornamented by
magnificent forests; whilst the western coast, from lat.
4 degs. S. to lat. 32 degs. S., may be described as a
desert; on this western coast, northward of lat. 4 degs.
S., where the trade-wind loses its regularity, and heavy
torrents of rain fall periodically, the shores of the
Pacific, so utterly desert in Peru, assume near Cape
Blanco the character of luxuriance so celebrated at
Guyaquil and Panama. Hence in the southern and northern
parts of the continent, the forest and desert lands occupy
reversed positions with respect to the Cordillera, and these
positions are apparently determined by the direction of the
prevalent winds. In the middle of the continent there is a
broad intermediate band, including central Chile and the
provinces of La Plata, where the rain-bringing winds have
not to pass over lofty mountains, and where the land is neither
a desert nor covered by forests. But even the rule, if
confined to South America, of trees flourishing only in a
climate rendered humid by rain-bearing winds, has a strongly
marked exception in the case of the Falkland Islands. These
islands, situated in the same latitude with Tierra del Fuego
and only between two and three hundred miles distant from
it, having a nearly similar climate, with a geological
formation almost identical, with favourable situations and the
same kind of peaty soil, yet can boast of few plants deserving
even the title of bushes; whilst in Tierra del Fuego it is
impossible to find an acre of land not covered by the densest
forest. In this case, both the direction of the heavy gales
of wind and of the currents of the sea are favourable to
the transport of seeds from Tierra del Fuego, as is shown
by the canoes and trunks of trees drifted from that country,
and frequently thrown on the shores of the Western Falkland.
Hence perhaps it is, that there are many plants in
common to the two countries but with respect to the trees
of Tierra del Fuego, even attempts made to transplant them
have failed.
During our stay at Maldonado I collected several quadrupeds,
eighty kinds of birds, and many reptiles, including
nine species of snakes. Of the indigenous mammalia, the
only one now left of any size, which is common, is the Cervus
campestris. This deer is exceedingly abundant, often in
small herds, throughout the countries bordering the Plata
and in Northern Patagonia. If a person crawling close along
the ground, slowly advances towards a herd, the deer frequently,
out of curiosity, approach to reconnoitre him. I
have by this means, killed from one spot, three out of the
same herd. Although so tame and inquisitive, yet when
approached on horseback, they are exceedingly wary. In this
country nobody goes on foot, and the deer knows man as its
enemy only when he is mounted and armed with the bolas.
At Bahia Blanca, a recent establishment in Northern Patagonia,
I was surprised to find how little the deer cared for
the noise of a gun: one day I fired ten times from within
eighty yards at one animal; and it was much more startled
at the ball cutting up the ground than at the report of
the rifle. My powder being exhausted, I was obliged to
get up (to my shame as a sportsman be it spoken, though
well able to kill birds on the wing) and halloo till the deer
ran away.
The most curious fact with respect to this animal, is the
overpoweringly strong and offensive odour which proceeds
from the buck. It is quite indescribable: several times
whilst skinning the specimen which is now mounted at the
Zoological Museum, I was almost overcome by nausea. I
tied up the skin in a silk pocket-handkerchief, and so carried
it home: this handkerchief, after being well washed, I
continually used, and it was of course as repeatedly washed;
yet every time, for a space of one year and seven months, when
first unfolded, I distinctly perceived the odour. This appears
an astonishing instance of the permanence of some
matter, which nevertheless in its nature must be most subtile
and volatile. Frequently, when passing at the distance of
half a mile to leeward of a herd, I have perceived the whole
air tainted with the effluvium. I believe the smell from the
buck is most powerful at the period when its horns are perfect,
or free from the hairy skin. When in this state the
meat is, of course, quite uneatable; but the Gauchos assert,
that if buried for some time in fresh earth, the taint is
removed. I have somewhere read that the islanders in the
north of Scotland treat the rank carcasses of the fish-eating
birds in the same manner.
The order Rodentia is here very numerous in species:
of mice alone I obtained no less than eight kinds. [4] The
largest gnawing animal in the world, the Hydrochaerus capybara
(the water-hog), is here also common. One which I
shot at Monte Video weighed ninety-eight pounds: its
length from the end of the snout to the stump-like tail, was
three feet two inches; and its girth three feet eight.
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