Description

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Context:

The presence of iguanas on the islands of Fiji & Tonga has been a mystery.
Because all other species of iguanas live in the America
So, how did these reptiles reach the islands of the South Pacific?

Do You Know About Iguanas :

Iguanas are large & gentle reptiles.
They are found in the rainforests of South America, Central America, & the Caribbean.
Their scientific name is Iguana iguana.
They are omnivorous & they belong to the Iguanidae family.
They are among the largest lizards in America. Their size can range from 3 to 6.5 feet & it weigh between 8 to 17 pounds.
Some other types of iguanas are found in places like Fiji & Galápagos Islands.

1. Habitat

● They Prefer tall trees for sunlight & safety.

● They are Good swimmers and stay close to water.

2. Size and Appearance

● Green Iguanas: They can Grow up to 6 feet and weigh 8-17 pounds.

● Females are smaller & they have black rings on tails.

● They also have non lethal venom for defense.

3. Types of Iguanas

● Green Iguana: Most common. And they are found in Mexico and Brazil.

● West Indian Rock Iguanas: Endangered, they are found in the West Indies.

● Land Iguanas: they are Found in Galápagos.

● Marine Iguanas: these are only iguanas that can swim.

● Desert Iguanas: they are Small. And they are found in Mojave & Sonoran deserts.

● Chuckwallas: They are Found in arid regions of North America.

Key Details :

1. The Discovery

There is A recent study. It suggested that the ancestors of Fiji's iguanas may have crossed the ocean on floating plants.
This method of traveling is called rafting.
So, now This idea challenges previous theories that the iguanas crossed land or came from an extinct group.

2. What is Rafting?

Rafting is when small animals travel across oceans on floating trees or plants.
It is common among small creatures. But lizards like iguanas can travel long distances too.
Iguanas can survive long trips because they have a slow metabolism. It also allows them to go without food for a long time.

3. Past Examples of Rafting

In 1995 scientists saw the green iguanas. they rafted 300 km in the Caribbean on debris from a hurricane.
Also, Galápagos Islands Iguanas are believed to have traveled 1,000 km from South America to the islands on floating vegetation.

Source: IE

Practice Question

Q. Which of the following iguana species is critically endangered ?

A) West Indian Rock Iguanas
B) Green Iguanas
C) Chuckwallas
D) Desert Iguanas

Correct Answer: A) West Indian Rock Iguanas

Explanation:

The West Indian Rock Iguanas are considered critically endangered and are native to the West Indies. This species is facing significant threats to its survival, including habitat destruction and invasive species.