science

Wigeon

Wigeon 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 Wigeon rather than just read about it. In short: The wigeons or widgeons are a group of birds, dabbling ducks currently classified in the genus Mareca along with two other species. There are three extant species of wigeon, in addition to one recently extinct species.

Key takeaways

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

Reference excerpt

The wigeons or widgeons are a group of birds, dabbling ducks currently classified in the genus Mareca along with two other species. There are three extant species of wigeon, in addition to one recently extinct species.

Biology

There are three extant species: the Eurasian wigeon (Mareca penelope; formerly Anas penelope), the American wigeon (M. americana; formerly A. americana) and the Chiloé wigeon (M. sibilatrix; formerly A. sibilatrix). A fourth species, the Amsterdam wigeon (M. marecula; formerly A. marecula), became extinct in the 19th century. The wigeons' closest relatives, forming with them the genus Mareca, are the Gadwall and the Falcated Duck. All three wigeons are similarly shaped, with a steep forehead and bulbous rear to the head. All three wigeon species hybridise in captivity while American and Eurasian wigeons hybridise in the wild. An American Wigeon × Mallard hybrid has also been recorded. The American wigeon was formerly called the baldpate by ornithologists, and some people still use that name, especially hunters. The diet of the wigeon consists mainly of grass leaves (~80%); other food types eaten are seeds (~10%) and roots and stems (~5%). Wigeons were formerly classified in the genus Anas but following a study in 2009 five extant species (3 species of wigeon, plus gadwall and falcated duck) were transferred to the resurrected genus Mareca.

References

Further reading Bailey HH (1919). "An interesting hybrid of Mareca penelope (Widgon) and Mareca americana (Baldpate)". Wilson Bulletin. 31: 25. Cox C, Jessie B. "Aging of American and Eurasian Wigeons in female-type plumages" (PDF). Birding. 37 (2): 156–164. Archived from the original (PDF) on 2012-10-19. Retrieved 2011-10-09. Harrison JM, Harrison JG (1968). "Wigeon × Chiloé Wigeon hybrid resembling American Wigeon". British Birds. 61: 169–171. Harrop A (1994). "Photo-forum: a presumed hybrid American Wigeon in Grampian". Birding World. 7: 116–7. Harrop A (1994). "Field identification of American Wigeon". Birding World. 7: 50–56. Jiquet F (1999). "Photo forum: Hybrid American Wigeons". Birding World. 12: 247–252. Larkin P (2000). "Eyelid colour of American Wigeon". British Birds. 93: 39–40. MacKay A (1996). "Hybrid wigeon resembling American Wigeon in Leicestershire". Birding World. 9: 146–7. Shiota T (1987). "A challenge in the identification of hybrid American and Eurasian Wigeon". Yacho. 496: 6, 18–19. Votier SC, Harrop AH, Denny M (2003). "A review of status and identification of American Wigeon in Britain and Ireland". British Birds. 96: 2–22. Watson GE (1970). "A presumed wild hybrid Baldpate × Eurasian Wigeon". The Auk. 87 (2): 353–7. doi:10.2307/4083926. JSTOR 4083926.

External links Photographs of hybrid wigeons can be seen here Archived 2010-11-20 at the Wayback Machine and here Archived 2010-12-18 at the Wayback Machine.

Illustrations

Worked examples

Example 1 — a first encounter with Wigeon

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

In research: Wigeon 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 Wigeon 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: Wigeon is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anseriformes stubs, Bird common names, Ducks, so understanding it makes those chapters shorter.
In everyday life: Look for Wigeon 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 Wigeon in 20 minutes

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

Frequently asked questions

What is Wigeon in simple terms?

Why does Wigeon 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 Wigeon?

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 Wigeon.