They Are Extraordinarily Tame And Fearless, And
Haunt The Neighborhood Of Houses For Offal.
If a hunting
party kills an animal, a number soon collect and patiently
await, standing on the ground on all sides.
After eating,
their uncovered craws are largely protruded, giving them a
disgusting appearance. They readily attack wounded birds:
a cormorant in this state having taken to the shore, was
immediately seized on by several, and its death hastened
by their blows. The Beagle was at the Falklands only
during the summer, but the officers of the Adventure, who
were there in the winter, mention many extraordinary instances
of the boldness and rapacity of these birds. They
actually pounced on a dog that was lying fast asleep close
by one of the party; and the sportsmen had difficulty in
preventing the wounded geese from being seized before their
eyes. It is said that several together (in this respect
resembling the Carranchas) wait at the mouth of a rabbit-hole,
and together seize on the animal when it comes out. They
were constantly flying on board the vessel when in the harbour;
and it was necessary to keep a good look out to prevent
the leather being torn from the rigging, and the meat or
game from the stern. These birds are very mischievous and
inquisitive; they will pick up almost anything from the
ground; a large black glazed hat was carried nearly a mile,
as was a pair of the heavy balls used in catching cattle. Mr.
Usborne experienced during the survey a more severe loss,
in their stealing a small Kater's compass in a red morocco
leather case, which was never recovered. These birds are,
moreover, quarrelsome and very passionate; tearing up the
grass with their bills from rage. They are not truly gregarious;
they do not soar, and their flight is heavy and clumsy;
on the ground they run extremely fast, very much like
pheasants. They are noisy, uttering several harsh cries, one
of which is like that of the English rook, hence the sealers
always call them rooks. It is a curious circumstance that,
when crying out, they throw their heads upwards and backwards,
after the same manner as the Carrancha. They build
in the rocky cliffs of the sea-coast, but only on the small
adjoining islets, and not on the two main islands: this is a
singular precaution in so tame and fearless a bird. The sealers
say that the flesh of these birds, when cooked, is quite
white, and very good eating; but bold must the man be who
attempts such a meal.
We have now only to mention the turkey-buzzard (Vultur
aura), and the Gallinazo. The former is found wherever
the country is moderately damp, from Cape Horn to North
America. Differently from the Polyborus Brasiliensis and
Chimango, it has found its way to the Falkland Islands. The
turkey-buzzard is a solitary bird, or at most goes in pairs. It
may at once be recognised from a long distance, by its lofty,
soaring, and most elegant flight. It is well known to be a
true carrion-feeder. On the west coast of Patagonia, among
the thickly-wooded islets and broken land, it lives exclusively
on what the sea throws up, and on the carcasses of dead
seals. Wherever these animals are congregated on the rocks,
there the vultures may be seen. The Gallinazo (Cathartes
atratus) has a different range from the last species, as it
never occurs southward of lat. 41 degs. Azara states that
there exists a tradition that these birds, at the time of the
conquest, were not found near Monte Video, but that they
subsequently followed the inhabitants from more northern
districts. At the present day they are numerous in the valley
of the Colorado, which is three hundred miles due south of Monte
Video. It seems probable that this additional migration has
happened since the time of Azara. The Gallinazo generally
prefers a humid climate, or rather the neighbourhood of
fresh water; hence it is extremely abundant in Brazil and
La Plata, while it is never found on the desert and arid
plains of Northern Patagonia, excepting near some stream.
These birds frequent the whole Pampas to the foot of the
Cordillera, but I never saw or heard of one in Chile; in Peru
they are preserved as scavengers. These vultures certainly
may be called gregarious, for they seem to have pleasure in
society, and are not solely brought together by the attraction
of a common prey. On a fine day a flock may often be
observed at a great height, each bird wheeling round and
round without closing its wings, in the most graceful
evolutions. This is clearly performed for the mere pleasure of
the exercise, or perhaps is connected with their matrimonial
alliances.
I have now mentioned all the carrion-feeders, excepting
the condor, an account of which will be more appropriately
introduced when we visit a country more congenial to its
habits than the plains of La Plata.
In a broad band of sand-hillocks which separate the
Laguna del Potrero from the shores of the Plata, at the
distance of a few miles from Maldonado, I found a group of
those vitrified, siliceous tubes, which are formed by lightning
entering loose sand. These tubes resemble in every particular
those from Drigg in Cumberland, described in the
Geological Transactions. [10] The sand-hillocks of Maldonado
not being protected by vegetation, are constantly changing
their position. From this cause the tubes projected above
the surface, and numerous fragments lying near, showed
that they had formerly been buried to a greater depth. Four
sets entered the sand perpendicularly: by working with
my hands I traced one of them two feet deep; and some
fragments which evidently had belonged to the same tube,
when added to the other part, measured five feet three
inches. The diameter of the whole tube was nearly equal,
and therefore we must suppose that originally it extended to
a much greater depth.
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