Young highfliers
By Nutan
Shukla
THERE are some species of birds
which can be fooled into laying much more number of eggs
than their normal clutch-size by removing the eggs as
they are laid. Bob White Quail is one such bird which can
lay up to 130 eggs. This has been proved in some
experiments. It has been claimed that this species lays 6
to 27 eggs, which is no doubt a very large number, but on
an average basis it is not the layer of the largest
clutch. This honour goes to the grey partridge.
Quails, partridges and
pheasants are classified in one family Phasianidae, which
includes 190 species which are found worldwide. Out of
them, pheasants are among the most spectacular birds in
the world. All but one of the 48 species found in the
world come from Asia. The Golden Pheasant, found in the
rainforests of South-East Asia, is so beautiful with its
golden and red combination that for a long time
naturalists of Europe were not prepared to believe that
there can be such a beautiful bird. They dismissed these
pheasants as figments of the imagination of Chinese
artists.
These birds sometimes
resort to dump-nesting in which two or more
females deposit their eggs in one and the same nest. This
habit occasionally results in abandoning of nests because
the clutches become so large that they are no longer
manageable.
Like megapodes
(mound-builders or those birds which build nest-mounds),
chicks of Cabots tragopan are able to fly soon
after hatching. They come out of the eggs in a very
advanced stage with a thick coat of coarse, shaggy down
and far advanced primaries which enable them to
immediately flutter up to perches when threatened. Not
only that, they are also in a position to climb on trees.
Their growth is so fast that within a day or two these
chicks start flying as well as any other young bird does.
Many members of the
pheasant family prefer to walk rather than fly. The
Mountain Quails of California may travel 60 km or more,
walking in a single file. The Snowcocks and Blood
Pheasants of the Himalayas also march to their feeding
grounds in a single file. Another species of Mountain
Quail (partridge) which used to be found in grass and
brushwood on steep Himalayan hillsides in the
Dehradun-Nainital region is believed to be extinct. It
was last reported in 1876.
The British bird
Redlegged Partridge is very clever as far as attaining
high reproductivity is concerned. Usually, the female
bird lays two separate clutches in two different nests at
the same time. One of them is incubated by the female
herself while the other by her mate. This ingenious
strategy not only facilitates the raising of two broods
at the same time, but also increases the chances of
survival of the chicks. Redlegged Partridge can lay up to
30 eggs. However, normal clutch-sizes of 12-15 are
usually recorded. The bird never covers its eggs even if
it is leaving the nest, but surprisingly, eggs left for
weeks and eventually incubated hatch with the same
success as those incubated immediately.
The Grey Partridge
male-female pair for life. Both parents share the duty of
rearing nestlings. If, unfortunately, the female dies,
dedication of the father becomes much more intense and he
continues to perform his duties towards the nestlings
alone, unlike many other birds who abandon their
offsprings in such a situation.
Looking after the young
ones single-handedly becomes much more difficult when the
bird is known for laying a clutch larger than the average
size. There are cases where clutches of 20 eggs have been
found. However, the largest was found in Britain in 1974
which contained 25 eggs. However, on an average this bird
has a clutch-size of 16-17 to a single hen.
Partridges and quails
are gregarious birds, while pheasants remain alone or in
family groups outside the breeding season. Most of the
birds have loud, raucous calls which help in keeping
contacts with the other members as well as warning the
other animals of the presence of predators.
In the event of danger
these birds take full advantage of their surroundigs,
they hide themselves by keeping very still under the
cover of bushes or undergrowth, and as the danger
approaches nearer they suddenly emerge out of the cover,
flying overhead, making harsh calls and loud clapping of
wings. This reaction is so sudden that it alarms and
confuses the predator.
They spend most of their
day scratching the ground to find seeds or insects. Along
with the food they also consume small stones which help
is grinding the food material inside the stomach. This
compensates absence of teeth in the birds bills.
Their large elastic crop, an extension of the gut, is
used to store food.
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