biology

Marianne white-eye

Marianne 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 Marianne white-eye rather than just read about it. In short: The Marianne white-eye (Zosterops semiflavus), also known as Seychelles chestnut-sided white-eye or Seychelles yellow white-eye, is an extinct species of small bird in the white-eye family. Taxonomy Edward Newton described it as a full species Zosterops semiflava in 1867, though subsequently it was considered a subspecies of the Mayotte white-eye.

Key takeaways

Marianne 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 Marianne white-eye to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Marianne white-eye from memory before moving on to harder problems.

Reference excerpt

The Marianne white-eye (Zosterops semiflavus), also known as Seychelles chestnut-sided white-eye or Seychelles yellow white-eye, is an extinct species of small bird in the white-eye family.

Taxonomy Edward Newton described it as a full species Zosterops semiflava in 1867, though subsequently it was considered a subspecies of the Mayotte white-eye. After a 2006 study showed that the Marianne white-eye is more closely related to the Karthala white-eye from Grande Comore and the white-eyes from the Mascarenes, the IOC restored it to a full species. The IUCN recognized it as full species in 2016.

Description It reached a size of 10 cm (3.9 in), the wing length was 5.8 to 6.3 cm (2.3 to 2.5 in), the length of the tail was 3.8 cm (1.5 in) and the length of the culmen 1.1 to 1.2 cm (0.43 to 0.47 in). It was generally greenish yellow with chestnut-coloured flanks and a conspicuous white eye-ring. The forehead and a line above the eyes were yellow. The top of the head and the back were yellow olive. The wings and the tail were black and the underparts were pale yellow. It was similar in appearance to the Mayotte race of the Malagasy white-eye (Zosterops maderaspatanus mayottensis). Nothing is known of its ecology.

Distribution and habitat It is known with certainty only from the small granitic islet of Marianne Island 0.962 mi2 (2.49 km2) in the Seychelles about 6 km (3.7 mi) east of La Digue. Reports that it also occurred on Praslin, La Digue, Silhouette Island and Mahé are unconfirmed. Due to the habitat destruction through agricultural development it apparently became extinct between 1870 and 1900 (according to IUCN around 1888). An expedition in 1940 led by Irish zoologist Desmond Vesey-Fitzgerald failed to find it. There is one specimen in the Natural History Museum in London.

References

Greenway, James C. (1967): Extinct and Vanishing Birds of the World Luther, Dieter (2005): Die ausgestorbenen Vögel der Welt

Illustrations

Worked examples

Example 1 — a first encounter with Marianne white-eye

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

In research: Marianne 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 Marianne 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: Marianne white-eye is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bird extinctions since 1500, Birds described in 1867, Birds of Seychelles, so understanding it makes those chapters shorter.
In everyday life: Look for Marianne 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 Marianne white-eye in 20 minutes

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

Frequently asked questions

What is Marianne white-eye in simple terms?

The Marianne white-eye (Zosterops semiflavus), also known as Seychelles chestnut-sided white-eye or Seychelles yellow white-eye, is an extinct species of small bird in the white-eye family. Taxonomy Edward Newton described it as a full species Zosterops semiflava in 1867, though subsequently it was…

Why does Marianne 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 Marianne 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 Marianne white-eye.