biology

Lestes congener

Lestes congener 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 Lestes congener rather than just read about it. In short: Lestes congener is a species of damselfly in the family Lestidae, the spreadwings. It is known by the common name spotted spreadwing.

Key takeaways

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

Reference excerpt

Lestes congener is a species of damselfly in the family Lestidae, the spreadwings. It is known by the common name spotted spreadwing.

Description Lestes congener can reach a length of 35–42 millimetres (1.4–1.7 in) in males, while females are smaller, reaching a length of 32–38 millimetres (1.3–1.5 in). In the western part of their range, these dragonflies are somewhat larger than in the eastern part. The thorax is slaty gray dorsally, with two dark elongated spots (hence the common name) on the latero-ventral surface. The eyes are blue in males, while in the females they are always brown. The abdomen is greyish to blackish with bronze reflections, the last two segments of the abdomen are pale gray. The wings are clear and transparent. Like other damselflies of the family Lestidae they hold their wings at about 45 degrees to the body when resting. The larvae are light brown and up to 25 millimeters long. The time of flight of the adults ranges from late July to mid-September.

Distribution This species is widespread throughout North America, in Canada and in the United States except in the southeastern states.

Habitat This damselfly lives on the banks of permanent and temporary water-filled ponds, on flooded river banks and on slow-moving water, on marshes and on swamps.

References

External links Lestes congener – Spotted Spreadwing. Bug Guide. Lestes congener images. CalPhotos. UC Berkeley. Spotted Spreadwing: Lestes congener. NJOdes: The Dragonflies and Damselflies of New Jersey.

Further reading Milne, L. and M. Milne. Field Guide to Insects and Spiders. National Audubon Society, Chantacleer Press, 1980. p 384

External links Media related to Lestes congener at Wikimedia Commons Data related to Lestes congener at Wikispecies

Illustrations

Worked examples

Example 1 — a first encounter with Lestes congener

Start with the simplest possible case. Write down what Lestes congener 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 Lestes congener 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 Lestes congener 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 Lestes congener

In research: Lestes congener 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 Lestes congener 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: Lestes congener is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fauna of the Eastern United States, Fauna of the Western United States, Insects described in 1861, so understanding it makes those chapters shorter.
In everyday life: Look for Lestes congener 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 Lestes congener in 20 minutes

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

Frequently asked questions

What is Lestes congener in simple terms?

Lestes congener is a species of damselfly in the family Lestidae, the spreadwings. It is known by the common name spotted spreadwing.

Why does Lestes congener 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 Lestes congener?

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 Lestes congener.