biology

Robust white-eye

Robust white-eye 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 Robust white-eye rather than just read about it. In short: The robust white-eye (Zosterops strenuus), also known as the Lord Howe white-eye or robust silvereye and locally as the "big grinnell", is an extinct species of bird in the family Zosteropidae. It was endemic to the lowland forests of Lord Howe Island, east of Australia.

Key takeaways

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

Reference excerpt

The robust white-eye (Zosterops strenuus), also known as the Lord Howe white-eye or robust silvereye and locally as the "big grinnell", is an extinct species of bird in the family Zosteropidae. It was endemic to the lowland forests of Lord Howe Island, east of Australia.

Description

It was a mainly green bird, around 7.6 cm (3.0 in) long, with a white belly and yellow throat, which separated it from other species of white-eye.

The robust white-eye built loosely constructed, cup-shaped nests out of palm fibre and dried grasses, which were sometimes found in shrubs overgrown with vines. This made the species vulnerable to predation by black rats (Rattus rattus), which were accidentally introduced in 1918 following the grounding of the steamship S.S. Makambo on the island. Although once common, the bird was extinct by 1923. Despite its small size, the bird was known to islanders as "big grinnell", to differentiate it from the much smaller but related "little grinnell", or Lord Howe silvereye (Zosterops lateralis tephropleurus), a subspecies of the silvereye. This subspecies is still hanging on, but is threatened with extinction.

References

Day, David (1981), The Encyclopedia of Vanished Species, London, Universal Books Ltd., pp109–110, ISBN 0-947889-30-2

Illustrations

Worked examples

Example 1 — a first encounter with Robust white-eye

Start with the simplest possible case. Write down what Robust white-eye 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 Robust white-eye 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 Robust white-eye 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 Robust white-eye

In research: Robust white-eye 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 Robust white-eye 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: Robust white-eye is common in secondary-school and first-year university syllabi. It links to neighbouring topics Birds described in 1855, Endemic birds of Australia, Extinct birds of Lord Howe Island, so understanding it makes those chapters shorter.
In everyday life: Look for Robust white-eye 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 Robust white-eye in 20 minutes

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

Frequently asked questions

What is Robust white-eye in simple terms?

Why does Robust white-eye 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 Robust white-eye?

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 Robust white-eye.