Komodo, or more so-called Komodo
dragons (Varanus komodoensis), is the world's largest lizard species that live
on the islands of Komodo, Rinca, Flores, Gili Mota, and Gili Dasami in Nusa
Tenggara. This lizard by the natives of Komodo island is also called by local
names ora.
Including
members of the lizard family Varanidae, and klad Toxicofera, dragons are the
largest lizards in the world, with an average length of 2-3 m. Their large size
is attributed to island gigantism, the tendency for the body meraksasanya
certain animals that live in small island linked to the absence of mammalian
carnivores on the island where dragons live, and metabolic rate are small
dragons. Because of his body, these lizards occupy the position of a top
predator that dominate the ecosystems in which they live.
Komodo
dragons are found by western researchers in 1910. Her body is great and
terrible reputation makes them popular zoo. Komodo dragons in the wild habitat
has shrunk due to human activities and therefore IUCN include dragons as a
species vulnerable to extinction. This large lizard is now protected under
Indonesian law and a national park, Komodo National yaituTaman, established to
protect them.
In
the wild, adult Komodo dragon usually weighs around 70 kilograms,but the
dragons are kept in captivity often have a greater body weight. Wild specimens
biggest ever having a length of 3.13 meters and weighing about 166 kilograms,
including the weight of undigested food in the stomach. Although Komodo dragons
are the largest lizards listed as still alive, but not the longest. This
reputation held by Papua lizard (Varanus salvadorii).
The
Komodo dragon has a tail as long as the body, and about 60 pieces of sharp
serrated teeth along approximately 2.5 cm, which is often substituted. Their
saliva is often blood-tinged, because its teeth are almost completely covered
by gingival tissue and this tissue naturally lacerated during feeding . This
creates an ideal culture for the virulent bacteria that live in their mouths.
The
Komodo dragon has a long tongue, yellow and forked. Komodo dragons males larger
than females, with skin the color of dark gray to brick red, while the female
is more colorful dragons green olives, yellow and have a small piece on throat.
Young Komodo dragons more colorful, with yellow, green and white on a black
background.
Komodo
does not have the sense of hearing, despite having the ear hole.] Komodo is
able to see as far as 300 m, but because retinanyahanya have cone cells, the
animal is probably not so well seen in the darkness of night. Komodo is able to
distinguish colors, but not how to distinguish stationary objects.
Komodo
dragon uses its tongue to detect taste and smell stimuli, like other reptiles,
with the vomeronasal sense using a Jacobson's organ, a sense that aids
navigation in the dark. With the help of the wind, and his habit of cocking his
head to the right and to the left when walking, dragons can detect the presence
of carrion as far as 4-9.5 kilometers. Dragons nostrils olfaction is not a good
tool because they do not have a diaphragm. These animals have no sense of taste
in the tongue, there are few nerve endings of taste in the back of the throat.
Dragons
scales, some of which are reinforced with bone, have sensory plaques connected
to nerves that facilitate the sense of touch. The scales around the ears, lips,
chin, and soles of the feet may have three or more sensory plaques.
Komodo
dragons were thought to be deaf when a study reported that whispers, raised
voices and shouting did not result in agitation (interference) in the wild
dragons. This was disputed when London Zoological Garden employee Joan Proctor
trained lizards to eat out with his voice, even when she could not be seen by
the lizards.
Komodo
is naturally only found in Indonesia, on the island of Komodo, Flores and Rinca
and several other islands in Nusa Tenggara. Live in dry open grassland, savanna
and tropical forest at low altitudes, this lizard likes hot and dry place. They
are active during the day, although sometimes it is also active at night.
Komodo dragons are largely solitary, coming together only to breed and eat.
Large
reptiles can sprint up to 20 miles per hour in short distances; swim very well
and can dive as deep as 4.5 meters, as well as clever climb trees using their
powerful claws.] To catch prey that is out of reach, the Komodo dragon may
stand on its hind legs and use its tail as a support. With increasing age,
dragon claws are used primarily as a weapon, because of its large size makes
climbing impractical.
For
shelter, dragons dig holes 1-3 meters wide with the front legs and strong
claws. Because of his body and the habit of sleeping in a hole, dragons can
conserve body heat throughout the night and reduces the time sunbathing on the
next morning. Komodo generally hunt at noon until late afternoon, but still
shade during the hottest part of the day. Dragons hiding places are usually
located in the dunes or hills with the sea breeze, open from vegetation, and
here and there scattered dung inhabitants. The place is generally also a
strategic location to ambush deer.
The
evolutionary development of the Komodo dragon started with the Varanus genus,
which emerged in Asia about 40 million years ago and then migrated to
Australia. About 15 million years ago, meeting the Australian continental shelf
and Southeast Asia allowed the lizards moved into the territory now known as
Indonesia. Komodo is believed to have evolved from its Australian ancestors 4
million years ago, and expanded its range into eastern territories as far as
Timor. Changes in sea level since the ice age has made the dragons agihan their
range is limited to the present.
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