proboscis monkeys

Description

proboscis monkeys

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Context:

Proboscis monkeys have truly legends noses.

Proboscis monkeys:

Scientific name: : Nasalis larvatus.
It is native to Borneo.
Habitat: Found primarily in mangrove forests, coastal swamps, and riverine forests in Borneo.

Physical Characteristics:

Males have a large, bulbous nose, which can exceed 10 cm in length.
Fur is reddish-brown, with a lighter underside.
Males are significantly larger than females.

Behaviour:

Diurnal and arboreal, spending most of their time in trees.
Known for their excellent swimming abilities, aided by partially webbed feet.

Diet:

Primarily folivorous, feeding on young leaves, seeds, and unripe fruits.
Also consume some insects and flowers.

Social Structure:

Live in groups called harems, consisting of one adult male, several females, and their offspring.
All-male bachelor groups also exist.

Reproduction:

Females give birth to a single offspring after a gestation period of around 166 days.
Births occur year-round but peak during certain seasons.

Conservation Status:

Listed as Endangered by the IUCN due to habitat loss and hunting.
Population decline attributed to deforestation and human encroachment.

Unique Features:

The large nose of males is thought to enhance vocalizations, helping attract mates.
The pot-bellied appearance is due to a specialized, chambered stomach for fermenting plant m

Source:

https://www.downtoearth.org.in/blog/wildlife-biodiversity/honk-these-monkeys-have-truly-legendary-noses-now-we-better-understand-why-they-evolved-96321

PRACTICE QUESTION

Q. Which of the following statements about Astamudi Lake in Kerala is NOT true?

A) Astamudi Lake is the second largest lake in Kerala, covering an area of about 125 square kilometers.

B) The lake is a Ramsar site, recognized for its ecological significance and biodiversity.

C) Astamudi Lake is a brackish water lagoon, formed by the convergence of eight rivers, hence the name "Astamudi" which means "eight confluences".

D) The lake is devoid of any islands within its expanse, unlike many other lakes in Kerala.

a)1 and 2

b) 2 and 3

c) 3 and 4

d) All four

Answer: d

Explanation:

Statement 1 is correct:

●Ashtamudi Lake, in the Kollam District of the Indian state of Kerala.

●It possesses a unique wetland ecosystem and a large palm-shaped water body, second only in size to the Vembanad estuary ecosystem of the state.

●Ashtamudi means 'eight hills or peaks' in the local Malayalam language.

●Astamudi Lake is the second largest lake in Kerala after Vembanad Lake. It covers an approximate area of 125 square kilometers.

Statement 2 is correct:

●Astamudi Lake is designated as a Ramsar site, which is a wetland of international importance under the Ramsar Convention. Ramsar sites are recognized for their ecological significance, and Astamudi Lake is known for its rich biodiversity, including various species of birds, fish, and other aquatic life

Statement 3 is correct:

●Astamudi Lake is a brackish water lagoon, meaning it contains a mixture of fresh water from rivers and saltwater from the sea. It is formed by the convergence of eight rivers, hence the name "Astamudi," which translates to "eight confluences" in Malayalam.

Statement 4 is incorrect:

●Astamudi Lake is not devoid of islands within its expanse. In fact, it is known for its numerous small islands and islets scattered throughout its waters, adding to its scenic beauty and ecological diversity. These islands provide habitat for various bird species and serve as nesting grounds for migratory birds.