science

Humphrey–Parkes terminology

Humphrey–Parkes terminology 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 Humphrey–Parkes terminology rather than just read about it. In short: Humphrey–Parkes terminology is a system of nomenclature for the plumage of birds. Before the Humphrey–Parkes system, plumage was named after the belief that a certain plumage was breeding plumage and others were not.

Key takeaways

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

Reference excerpt

Humphrey–Parkes terminology is a system of nomenclature for the plumage of birds. Before the Humphrey–Parkes system, plumage was named after the belief that a certain plumage was breeding plumage and others were not. However, as this system did not always work correctly, the new Humphrey–Parkes came into use to rectify this error. This terminology is named after P. S. Humphrey and K. C. Parkes. Under the Humphrey–Parkes nomenclature, the main adult plumage, especially when it is produced by a complete molt, is called basic plumage. In most birds, the non-breeding plumage, which is worn longer than the breeding plumage, is known as the basic plumage. In birds that molt only once a year, the regular and only plumage is known as basic plumage. In some birds, a partial molt occurs before the bird breeds. This plumage is known as the alternate plumage and is generally what was previously known as a bird's breeding plumage. If a bird produces a third plumage in addition to the basic and alternate, it is known as supplemental plumage. This plumage is most frequently found in ptarmigans. The unique plumage of a juvenile bird is known as juvenal (or less precisely, juvenile) plumage. When the bird is molting, the molt is known as a prejuvenal, prebasic, prealternate, or presupplemental molt, depending on which type follows the molt. For birds that do not completely molt into full adult plumage the first time, a numbering system is used to signify which plumage it is in. For example, for the first time a bird enters basic plumage, the plumage is known as first basic plumage; the second, second basic plumage. The numbers are dropped after a bird achieves its full adult plumage.

References

Bonney, Rick; Rohrbaugh, Jr., Ronald (2004), Handbook of Bird Biology (Second ed.), Princeton, NJ: Princeton University Press, ISBN 0-938027-62-X

Worked examples

Example 1 — a first encounter with Humphrey–Parkes terminology

Start with the simplest possible case. Write down what Humphrey–Parkes terminology 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 Humphrey–Parkes terminology 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 Humphrey–Parkes terminology 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 Humphrey–Parkes terminology

In research: Humphrey–Parkes terminology 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 Humphrey–Parkes terminology 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: Humphrey–Parkes terminology is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bird stubs, Birds, so understanding it makes those chapters shorter.
In everyday life: Look for Humphrey–Parkes terminology 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.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Humphrey–Parkes terminology” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Humphrey–Parkes terminology in 20 minutes

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

Frequently asked questions

What is Humphrey–Parkes terminology in simple terms?

Why does Humphrey–Parkes terminology 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 Humphrey–Parkes terminology?

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 Humphrey–Parkes terminology.