biology

Hydropsalis

Hydropsalis 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 Hydropsalis rather than just read about it. In short: Hydropsalis is a genus of nightjars in the family Caprimulgidae. The species are widely distributed across the tropical and subtropical regions of the New World.

Key takeaways

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

Reference excerpt

Hydropsalis is a genus of nightjars in the family Caprimulgidae. The species are widely distributed across the tropical and subtropical regions of the New World.

Taxonomy The genus Hydropsalis was introduced in 1832 by the German naturalist Johann Georg Wagler. The type species was designated by George Robert Gray in 1855 as Caprimulgus furcifer Vieillot 1817. This taxon is now considered as a subspecies of the scissor-tailed nightjar (Hydropsalis torquata). The genus name combines the Ancient Greek hudro- meaning "water-" with psalis meaning "pair of scissors". The genus contains four species:

White-tailed nightjar, Hydropsalis cayennensis – Costa Rica through north South America Ladder-tailed nightjar, Hydropsalis climacocerca – Amazonia Scissor-tailed nightjar, Hydropsalis torquata – Amazonia and south Peru to south Brazil and central Argentina Long-trained nightjar, Hydropsalis forcipata – southeastern Brazil and adjacent northeastern Argentina (Misiones)

References

Illustrations

Worked examples

Example 1 — a first encounter with Hydropsalis

Start with the simplest possible case. Write down what Hydropsalis 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 Hydropsalis 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 Hydropsalis 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 Hydropsalis

In research: Hydropsalis 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 Hydropsalis 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: Hydropsalis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bird genera, Birds of South America, Birds of the Guiana Shield, so understanding it makes those chapters shorter.
In everyday life: Look for Hydropsalis 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 Hydropsalis in 20 minutes

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

Frequently asked questions

What is Hydropsalis in simple terms?

Hydropsalis is a genus of nightjars in the family Caprimulgidae. The species are widely distributed across the tropical and subtropical regions of the New World.

Why does Hydropsalis 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 Hydropsalis?

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 Hydropsalis.