science

Indochinese black langur

Indochinese black langur is a science 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 Indochinese black langur rather than just read about it. In short: The Indochinese black langur (Trachypithecus ebenus) is a poorly known Old World monkey native to Laos and adjacent Vietnam. It was originally described as a subspecies of T. auratus, but was later found to be a member of the T. francoisi group, with some maintaining it as a subspecies of that species.

Key takeaways

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

Reference excerpt

The Indochinese black langur (Trachypithecus ebenus) is a poorly known Old World monkey native to Laos and adjacent Vietnam. It was originally described as a subspecies of T. auratus, but was later found to be a member of the T. francoisi group, with some maintaining it as a subspecies of that species. In 2001, it was recommended treating it as a separate species. Except for its almost entirely black pelage, it resembles the other members of the T. francoisi group. Uniquely in this group, it and the related T. hatinhensis appear to be parapatric, T. ebenus showing what appears to be signs of intergradation with T. hatinhensis are known, and genetically the two barely are separable. This has led to suggestions that it may be a black morph of that taxon, which in turn possibly should be considered a subspecies of T. laotum. A survey that included 67 T. hatinhensis revealed a high level of variation in the amount of white to the head, and ebenus was maintained as a morph. It was formerly considered data deficient by IUCN, but they now include it in the endangered T. hatinhensis.

References

Worked examples

Example 1 — a first encounter with Indochinese black langur

Start with the simplest possible case. Write down what Indochinese black langur claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Indochinese black 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 Indochinese black 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 Indochinese black langur

In research: Indochinese black langur appears in science 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 Indochinese black 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: Indochinese black langur is common in secondary-school and first-year university syllabi. It links to neighbouring topics Arboreal mammals, Mammals described in 1995, Mammals of Laos, so understanding it makes those chapters shorter.
In everyday life: Look for Indochinese black 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 Indochinese black langur in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Indochinese black 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 Indochinese black langur out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Indochinese black langur in simple terms?

Why does Indochinese black langur matter?

Because it connects several science 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 Indochinese black 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 Indochinese black langur.