Gecko
The gecko is a small to medium species of lizard that is
found in the more temperate and tropical regions of the world. Geckos are more
commonly found around the Equator and in the Southern Hemisphere although a few
species of gecko are found north of the Equator in warmer regions.
There are thought to be over 2,000 different species of
gecko found around the world and it is widely believed that there are more
species of gecko that ate yet to be discovered, but basically only two types of
geckos, those with movable eyelids and those without. Geckos are found in a
wide variety of colours and have various different markings on their bodies
depending on the species of gecko.
Geckos are found in a wide variety of habitats in the
warmer parts of the world including rocky deserts, mountains, jungles,
rainforests, grasslands and even in urban areas where it is common to find
geckos in houses.
Geckos can range in size from just a few centimetre to
more than 50 cm in length. The largest species of gecko is the Delcourt's gecko
(which is now believed to be extinct), native to New Zealand and it grows to
nearly 60 cm in length. The Jaragua Sphaero found in the Dominican Republic in
South America, is the smallest species of gecko in the world and averages less
than 2cm in length.
Geckos come in various patterns and
colors and are among the most colourful lizards in the world. Some species can
change color and may be lighter in color at night. Geckos are cold-blooded,
which means they need the sun rays to warm them, the tiny scales protect them
from the sun. Geckos are well known for their amazing ability to walk up
vertical surfaces even those as smooth as glass. Most geckos have sticky toe
pads, composed of microscopic Velcro-like, hooked bristles, called setae on the
bottom of their feet. It allows them to climb on flat surfaces. Geckos that
live in the desert areas have fringed feet that allow them to run across the
sand very easily. This adaptation means that the gecko is a very agile animal.
Geckos are carnivorous reptiles so the diet of the gecko
is based on meat from other animals. Geckos primarily eat insects and worms,
but some of the larger species of gecko hunt small birds, reptiles and even
small mammals such as mice. Some species of gecko are also known to eat a small
amount of plant matter such as moss. Some species actually eat other geckos! Due
to their small size, geckos have a number of natural predators around the
world, with the snake being the main predator of the gecko. Other animals that
prey on the gecko include large spiders, birds and some mammal species. If a
gecko is caught by the tail it will detach its tail. Geckos detach their tail
as a defend mechanism, when the gecko feels threatened it will detach its tail
and leaving it flailing to distract a possible predator. Soon enough, the gecko
will grow back a new tail , a process called autotomy.
Some species are parthenogenetic, which means the female
is capable of reproducing without copulating with a male. This improves the
gecko’s ability to spread to new island. However in a situation where a single
female gecko populates an entire island, the island will suffer from lack of
genetic variation within the geckos that inhabit it. The gecko’s mating call
sounds like a shortened bird chirping which attracts males, when they are
nearby. After mating, the female gecko lays 2 sticky eggs, that have a soft
shell and are white in colour. The gecko eggs quickly harden so that the
developing gecko inside is more protected. The eggs of the gecko can take
between 1 and 3 months to hatch but the incubation period is largely dependent
on the species of gecko and the area in which it inhabit. The female gecko is
not known to nurse or look after the baby geckos after they hatch.
Today, many species of gecko are considered to be
threatened with extinction due to habitat loss and pollution. Geckos are also
popular pets around the world and many are caught in the wild to be sold into
the exotic pet trade. Common ones to have pets are Leopard Geckos and the Tokay
Geckos. A Leopard Gecko is relatively easy to care for is naturally tame. They
are nocturnal, meaning they sleep through the day and their skin is patterned
with a cool leopard print. Most of today’s Leopard Geckos originated in
Pakistan.
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