Are
big cats really big and are small cats really small? These two are the most
important questions that come to one’s mind when he sees the words ‘big cat’
and ‘small cat’ in various books and articles. This division is not a
biological division. The family ‘Felidae’, informally called the cat family,
contains 37 species including the domestic cat. Among these, only seven species
are considered as ‘big cats’ because of their superior size and power compared
to other cats, but still two more cats, puma and cheetah, despite being quite
large in size, are considered as small cats because they resemble the small
cats in their body form rather than big cats. So one should remember the fact
that the terms ‘big’ and ‘small’ don’t exactly refer to their body size here. No
doubt that the biggest of the big cats is more than thrice heavier than the
biggest of the small cats, but there are some big cats which are more than
thrice smaller than the biggest of the small cats!
Now
let us consider the division of the family Felidae. This family has been
divided into three subfamilies, namely Pantherinae
(big cats or great cats), Felinae
(small cats) and Acinonynae (cheetah
or hunting leopard). Earlier cheetah was also included in the subfamily felinae
of small cats, but later scientists discovered that the cheetah differs
significantly either from big cats or small cats, so they placed it in its own
subfamily. Currently, seven species in three genera, which belong to the
subfamily Pantherinae, are considered as big cats. Let us take a look at these
great cats.
1) Genus Panthera:
This genus contains four species and they are the only members of the cat
family which are able to roar. So they are called ‘true big cats’ or ‘roaring
cats’. A flexible hyoid bone and other morphological modifications of their
larynx enable them to roar. Tiger, Lion, Jaguar and Leopard (Panther) belong to
this genus. They are the supreme hunters in their habitat and undoubtedly the
perfect hunting machines designed by the nature. Among them, Tiger, Lion and
Leopard are old world big cats whereas Jaguar is the big cat of new world and
incidentally it is the largest cat of western hemisphere and the apex predator
of new world jungles. Let us learn about these great cats briefly.
a) Tiger (Panthera tigris): This is the largest
extant cat on the earth today. There are eight recognized subspecies of tiger,
out of which three are extinct today. Siberian tiger or Amur tiger (Panthera tigris altaica) is the biggest
among them; full grown males reaching as much as 11 foot in length and can
weigh 300 kg. the average weight is around 230 kg for males and 170 kg for the
females. The largest ever recorded Siberian tiger weighed 384 kg. this is a
critically endangered cat now, with only about 350-400 tigers remaining in the
wild. They have thick fur and paler coats. Since the prey species are very
scarce here, the density of tigers in Siberian jungles is very low compared to
our Indian jungles. It is possible that only one tiger can be ruling an area as
large as 500-600 sq.kms. the second largest is the Royal Bengal tiger. The
average weight of these tigers is 205 kg. A tiger named Khali of Corbett
national park, though not measured accurately, was estimated by its appearance
to be 10 feet long and about 300-340 kg in weight. It’s common for the males to
reach a weight in excess of 220 kg. Indo-china tiger or Corbett tiger, South
China tiger, Sumatra tiger, Caspian tiger, Bali tiger and Java tiger are the
other subspecies of tiger, out of which the last three are extinct now.
recently, the Malayan tiger has been placed separately from south china tiger,
making the total number of extant tiger subspecies to six.
b) Lion (Panthera leo): Lion is the second largest extant
cat. This cat is unique in having a mane, the hair that grows around the neck
and face of males. This big cat exists in Asia and Africa and the African lions
are slightly bigger and have denser manes than the Asian lions. Their average
length ranges from 9-9.5 feet and weight ranges from 140-180 kg. some
outstanding African males can reach 250 kg also. The largest lion ever seen in
the wild weighed 313 kg and the largest known lion in captivity weighed 375 kg.
they are the most sociable of all cats and they can bring down much larger prey
due to their priding habits. In Africa, they can kill huge animals like cape
buffalos, giraffes, hippopotamuses and sometimes even elephants also. In India,
they are restricted to the gir reserve forest of Gujarat. Only about 400 lions
are left there today. Like tigers, lions also have nine subspecies, out of
which Barbary lion, the largest subspecies, is extinct now.
c) Jaguar (Panthera onca): This robust cat looks
similar to our leopard, but it is stockier and has shorter legs. The rosettes
are darker than that of leopards and they have small black dots at the centre
of the rosettes which the panther lacks. On an average, they weigh around
60-100 kg and enormously built males can reach 160 kg also, almost as large as
a full grown tigress or lioness. It is common for the males to cross 100 kg.
they have the strongest bite among cats and stand next only to hyenas among the
carnivores. They bite their prey into its head and can split its skull with its
powerful jaws, directly piercing the brain of the animal. They are the supreme
and apex predators of Amazon rainforests. Melanism is frequently observed in
jaguars. Melanistic jaguars are jet black in color, but still their rosettes
are visible on closer inspection. They have the shortest tail of any big cats
which is just 45-75 cm in length. The main prey of jaguars includes tapirs,
peccaries, capybaras, turtles, sloths etc and sometimes even as large and
powerful animals as caimans and anacondas also. Numerous subspecies of jaguars
were proposed by many biologists earlier but recent studies have revealed just
three subspecies.
d) Panther (Panthera pardus): The words panther and
leopard are used interchangeably to this animal. This is the most widespread
member of the family, probably with the exception of domestic cat. The average
weight of panthers is around 40-70 kg. some large males can reach 90 kg also. A
gigantic male named Balaji in Sri Venkateshwara zoological park in Tirupathi
weighed 139 kg. probably that could be the largest panther ever recorded, for
it is very rare for these cats to reach 100 kg. being smaller than other big cats, they can
easily climb trees and that exceptional ability helps them to protect
themselves against other carnivores like tigers and wild dogs. But despite
their smaller size, they can easily drag a prey twice as heavy as itself onto
the top of a tree to feed on it leisurely. They are much more intelligent,
agile and cunning than their larger relatives. If a panther turns into man
eater, it’s extremely hard to bring it to book. The infamous case of The man-eating
leopard of Rudraprayag can be remembered here. That deadly leopard terrorized
the entire north India from 1918 to 1926. The fact that it took eight long and
dreadful years to hunt this leopard. The famous big game hunter Gim Corbett
hunted it in 1926, ending a nightmare and trail of blood that stretched for
eight years. According to the government documents, this leopard had killed and
eaten 124 people in this period, but Corbett says that many of the killings
that took place there were never reported and the actual number could have been
twice or thrice this number. Eight subspecies have been considered to be valid
today.
1) Genus Uncia:
a)
Snow leopard (Uncia uncia): This was previously called as Panthera uncia, but later it was placed
in its own genus Uncia, because despite having a flexible
hyoid bone like other big cats, it can’t roar, because it lacks other
morphological modifications that are found in the above mentioned big cats. So
the scientists placed it separately from the roaring cats. However recent molecular studies have shown that
this great cat is a close relative of tiger and must be renamed as Panthera uncia. The debate is still hot.
They can grow up to 5-7 feet in length, including their thickly furred tail and
can weigh between 27-55 kg. Large males can reach up to 75 kg also. Even though
they are smaller than the roaring cats, they are capable of killing animals
much larger than themselves in size.
This species is limited to south and central Asia.
3)
Genus Neofelis:
a) Clouded leopard (Neofelis nebulosa):
This is the smallest of the big cats. The weight range is between 12 to 23 kg. The
largest males can reach the size of a leopardess or snow leopardess, with 35
kg, but it is very rare. They have the longest canine teeth of any cat. This is
also the most acrobatic of any cat. It has the ability to climb the trees, hang
upside down to the branches and is capable of doing many other acrobatic
activities which no other cat is capable of doing.
b)
Bornian clouded leopard or Sunda clouded
leopard (Neofelis diardi): For
long this animal was regarded the same as the mainland clouded leopard, but
recently, in 2006, detailed DNA studies have revealed that it has more than 40
differences in the genes when compared to mainland clouded leopards. So they
are regarded as a separate species. In size, shape, habits and appearance they are
very similar to mainland clouded leopards.
So,
to put it in a nutshell, all the cats belonging to the subfamily Pantherinae are big cats and all those
cats belonging to the subfamily Felinae and
cheetah are small cats. Puma, also called cougar or mountain lion, which looks
very similar to a lioness in appearance, is the second largest cat of Americas
after jaguar, but despite its much larger size, it is regarded as a small cat,
because its body structure resembles the small cats rather than big cats. So it
is regarded as the largest of small cats. An average puma weighs around 50-100
kg, with 136 kg being the maximum weight recorded. So the name ‘mountain lion’
is actually a misnomer for this animal. Similarly cheetah, which is almost the
same size of a leopard, is also a small cat owing to its rigid hyoid bone.