Captain Sturt, [11] When
Descending The Murrumbidgee, In Australia, Saw Two Emus
In The Act Of Swimming.
The inhabitants of the country readily distinguish, even
at a distance, the cock bird from the hen.
The former is
larger and darker-coloured, [12] and has a bigger head. The
ostrich, I believe the cock, emits a singular, deep-toned,
hissing note: when first I heard it, standing in the midst of
some sand-hillocks, I thought it was made by some wild
beast, for it is a sound that one cannot tell whence it comes,
or from how far distant. When we were at Bahia Blanca
in the months of September and October, the eggs, in
extraordinary numbers, were found all over the country. They
lie either scattered and single, in which case they are never
hatched, and are called by the Spaniards huachos; or they
are collected together into a shallow excavation, which forms
the nest. Out of the four nests which I saw, three contained
twenty-two eggs each, and the fourth twenty-seven.
In one day's hunting on horseback sixty-four eggs were
found; forty-four of these were in two nests, and the remaining
twenty, scattered huachos. The Gauchos unanimously
affirm, and there is no reason to doubt their statement,
that the male bird alone hatches the eggs, and for
some time afterwards accompanies the young. The cock
when on the nest lies very close; I have myself almost
ridden over one. It is asserted that at such times they
are occasionally fierce, and even dangerous, and that they
have been known to attack a man on horseback, trying to
kick and leap on him. My informer pointed out to me an old
man, whom he had seen much terrified by one chasing him. I
observe in Burchell's travels in South Africa, that he remarks,
"Having killed a male ostrich, and the feathers being
dirty, it was said by the Hottentots to be a nest bird." I
understand that the male emu in the Zoological Gardens
takes charge of the nest: this habit, therefore, is common
to the family.
The Gauchos unanimously affirm that several females
lay in one nest. I have been positively told that four or
five hen birds have been watched to go in the middle of the
day, one after the other, to the same nest. I may add, also,
that it is believed in Africa, that two or more females lay
in one nest. [13] Although this habit at first appears very
strange, I think the cause may be explained in a simple
manner. The number of eggs in the nest varies from twenty
to forty, and even to fifty; and according to Azara, some
times to seventy or eighty. Now, although it is most probable,
from the number of eggs found in one district being
so extraordinarily great in proportion to the parent birds,
and likewise from the state of the ovarium of the hen, that
she may in the course of the season lay a large number, yet
the time required must be very long. Azara states, [14] that a
female in a state of domestication laid seventeen eggs, each
at the interval of three days one from another. If the hen
was obliged to hatch her own eggs, before the last was laid
the first probably would be addled; but if each laid a few
eggs at successive periods, in different nests, and several
hens, as is stated to be the case, combined together, then
the eggs in one collection would be nearly of the same age.
If the number of eggs in one of these nests is, as I believe,
not greater on an average than the number laid by one
female in the season, then there must be as many nests as
females, and each cock bird will have its fair share of the
labour of incubation; and that during a period when the
females probably could not sit, from not having finished
laying. [15] I have before mentioned the great numbers of
huachos, or deserted eggs; so that in one day's hunting
twenty were found in this state. It appears odd that so
many should be wasted. Does it not arise from the difficulty
of several females associating together, and finding a male
ready to undertake the office of incubation? It is evident
that there must at first be some degree of association between
at least two females; otherwise the eggs would remain
scattered over the wide plain, at distances far too great to
allow of the male collecting them into one nest: some authors
have believed that the scattered eggs were deposited
for the young birds to feed on. This can hardly be the case
in America, because the huachos, although often found
addled and putrid, are generally whole.
When at the Rio Negro in Northern Patagonia, I repeatedly
heard the Gauchos talking of a very rare bird which
they called Avestruz Petise. They described it as being less
than the common ostrich (which is there abundant), but
with a very close general resemblance. They said its colour
was dark and mottled, and that its legs were shorter, and
feathered lower down than those of the common ostrich.
It is more easily caught by the bolas than the other species.
The few inhabitants who had seen both kinds, affirmed they
could distinguish them apart from a long distance. The
eggs of the small species appeared, however, more generally
known; and it was remarked, with surprise, that they were
very little less than those of the Rhea, but of a slightly
different form, and with a tinge of pale blue. This species occurs
most rarely on the plains bordering the Rio Negro; but about
a degree and a half further south they are tolerably abundant.
When at Port Desire, in Patagonia (lat. 48 degs.), Mr.
Martens shot an ostrich; and I looked at it, forgetting at
the moment, in the most unaccountable manner, the whole
subject of the Petises, and thought it was a not full-grown
bird of the common sort.
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