biology

Large white-faced darter

Large white-faced darter 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 Large white-faced darter rather than just read about it. In short: The large white-faced darter or yellow-spotted whiteface (Leucorrhinia pectoralis) is a small dragonfly belonging to the genus Leucorrhinia in the family Libellulidae. This species is 32–39 millimetres (1.3–1.5 in) long and is the largest member of its genus in Europe.

Key takeaways

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

Reference excerpt

The large white-faced darter or yellow-spotted whiteface (Leucorrhinia pectoralis) is a small dragonfly belonging to the genus Leucorrhinia in the family Libellulidae. This species is 32–39 millimetres (1.3–1.5 in) long and is the largest member of its genus in Europe. It is easily identified by the large yellow seventh segment of its abdomen. It inhabits marshy borders and prefers less acidic waters than its close relative the white-faced darter, (Leucorrhinia dubia). It occurs from western Siberia to parts of France. From England, there was only one record in Kent in June 1859 until two sightings in May 2012 in Suffolk.

References

External links Media related to Leucorrhinia pectoralis at Wikimedia Commons Data related to Leucorrhinia pectoralis at Wikispecies

Illustrations

Worked examples

Example 1 — a first encounter with Large white-faced darter

Start with the simplest possible case. Write down what Large white-faced darter 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 Large white-faced darter 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 Large white-faced darter 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 Large white-faced darter

In research: Large white-faced darter 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 Large white-faced darter 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: Large white-faced darter is common in secondary-school and first-year university syllabi. It links to neighbouring topics Dragonflies of Europe, Habitats Directive species, Insects described in 1825, so understanding it makes those chapters shorter.
In everyday life: Look for Large white-faced darter 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 Large white-faced darter in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Large white-faced darter 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 Large white-faced darter out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Large white-faced darter in simple terms?

Why does Large white-faced darter 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 Large white-faced darter?

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 Large white-faced darter.