biology

Laotian langur

Laotian langur is a biology topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Laotian langur rather than just read about it. In short: The Laotian langur or white-browed black langur (Trachypithecus laotum) is a species of the primate family Cercopithecidae that is endemic to Laos in Southeast Asia. It is closely related to other primates found in the region such as Indochinese black langur and Hatinh langur.

Key takeaways

Laotian langur belongs to biology; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Laotian langur to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Laotian langur from memory before moving on to harder problems.

Reference excerpt

The Laotian langur or white-browed black langur (Trachypithecus laotum) is a species of the primate family Cercopithecidae that is endemic to Laos in Southeast Asia. It is closely related to other primates found in the region such as Indochinese black langur and Hatinh langur. It is classified as endangered in the IUCN Red List.

Taxonomy Laotian langur is a species of the primate family Cercopithecidae. It was first described by English zoologist Oldfield Thomas in 1921. Studies have found that the Laotian langur is genetically closely related to the Indochinese black langur and Hatinh langur. There has been suggestions zoologists to consider these as subspecies of the Laotian langur.

Distribution and habitat The species is endemic to Laos in Southeast Asia. Its natural habitat consists of subtropical or tropical dry forests. It is classified as endangered in the IUCN Red List. Studies in 2021 have indicated that the langur habitats have shrunk due to deforestation and hunting. Based on the sightings, the langur groups consisted of fewer members compared to earlier studies done in the 1990s. The langur habitats have been protected by the establishment of various protected areas such Nam Kading National Protected Area, Nam Ha National Protected Area, and Phou Hin Poun National Biodiversity Conservation Area.

Morphology The Laotian langur has a dark black fur covering most of the body. The face is black with white hair encircling it. It has small ruft of black hair on top of the head. New borns have a golden fur, which changes color while the monkeys grow. Juveniles have similar appearance to the adults though the fur color might be paler and are usually smaller in size. It has four fingers on the limbs with a short thumb, which is an adaptation for their arboreal lifestyle. The Laotian langur has a multi chambered stomach, which helps in the digestion of the plant matter.

Behaviour Laotian Langurs are primarily herbivorous and the diet consists of leaves, fruits, seeds, and flowers. They share a sympatric relationship with the Assamese macaque in their range. They often feed on the same trees, though the langurs occupy higher positions compared to the macaques. The langurs occupy limestone caves in rocks and cliffs, which serves as a shelter from predation and weather. As they consume a vegetation heavy diet, they often spend long times resting, and socializing.

References

Illustrations

Worked examples

Example 1 — a first encounter with Laotian langur

Start with the simplest possible case. Write down what Laotian langur claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Laotian langur before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Laotian langur ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Laotian langur

In research: Laotian langur appears in biology research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Laotian langur in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Laotian langur is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arboreal mammals, Endemic fauna of Laos, IUCN Red List endangered species, so understanding it makes those chapters shorter.
In everyday life: Look for Laotian langur outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Laotian langur in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Laotian langur means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Laotian langur out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Laotian langur in simple terms?

Why does Laotian langur matter?

Because it connects several biology ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Laotian langur?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Laotian langur.