science

Stiff-tailed duck

Stiff-tailed duck 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 Stiff-tailed duck rather than just read about it. In short: The stiff-tailed ducks, the genus Oxyura, are part of the Oxyurini tribe of ducks. All ducks in the genus have, as their name implies, long, stiff tail feathers which are erect when the bird is resting.

Key takeaways

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

Reference excerpt

The stiff-tailed ducks, the genus Oxyura, are part of the Oxyurini tribe of ducks. All ducks in the genus have, as their name implies, long, stiff tail feathers which are erect when the bird is resting. They all have relatively large, swollen bills. These are freshwater diving ducks. Their legs are set far back, which makes them awkward on land and they rarely leave the water. Their uncommon displays involve drumming noises from inflatable throat sacs, throwing its head back, and erect short crests on its head. Plumage sequences are complicated and aging difficult. Plumage is vital for survival because the bird spends most of its time in the water.

Taxonomy The genus Oxyura was introduced (as a subgenus) in 1828 by the French naturalist Charles Lucien Bonaparte to accommodate a single taxon, Anas rubidus Wilson, 1814. It is now considered to be a synonym of Anas jamaicensis Gmelin 1789, the ruddy duck. The genus name is derived from Ancient Greek oxus, meaning "sharp" and oura meaning "tail". The six extant members of the genus are distributed widely throughout North America, South America, Australia, Asia, and much of Africa.

Species

A fossil species from the Late Pliocene or Early Pleistocene of Jalisco (Mexico) was described as Oxyura zapatanima. It resembled a small ruddy duck or, even more, an Argentine blue-bill. A larger Middle Pleistocene fossil form from California was originally described as Oxyura bessomi. A re-examination of the type specimen revealed it instead most likely belongs within the genus Anas, with referred specimens lying within the range of the ruddy duck. "Oxyura" doksana from the Early Miocene of Dolnice (Czech Republic) cannot be assigned to any anatine subfamily with certainty.

References

Further reading Worthy, Trevor H.; Tennyson, A.J.D.; Jones, C.; McNamara, J.A. & Douglas, B.J. (2007): Miocene waterfowl and other birds from central Otago, New Zealand. J. Syst. Palaeontol. 5(1): 1-39. doi:10.1017/S1477201906001957 (HTML abstract)

Illustrations

Worked examples

Example 1 — a first encounter with Stiff-tailed duck

Start with the simplest possible case. Write down what Stiff-tailed duck 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 Stiff-tailed duck 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 Stiff-tailed duck 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 Stiff-tailed duck

In research: Stiff-tailed duck 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 Stiff-tailed duck 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: Stiff-tailed duck is common in secondary-school and first-year university syllabi. It links to neighbouring topics Ducks, Extant Miocene first appearances, Oxyura, so understanding it makes those chapters shorter.
In everyday life: Look for Stiff-tailed duck 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 Stiff-tailed duck in 20 minutes

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

Frequently asked questions

What is Stiff-tailed duck in simple terms?

Why does Stiff-tailed duck 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 Stiff-tailed duck?

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 Stiff-tailed duck.