biology

White-chested white-eye

White-chested 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 White-chested white-eye rather than just read about it. In short: The white-chested white-eye (Zosterops albogularis) also known as white-breasted white-eye or Norfolk white-eye was a passerine from the family Zosteropidae. It was endemic to Norfolk Island between New Caledonia and New Zealand and was regarded as either extremely rare or possibly extinct.

Key takeaways

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

Reference excerpt

The white-chested white-eye (Zosterops albogularis) also known as white-breasted white-eye or Norfolk white-eye was a passerine from the family Zosteropidae. It was endemic to Norfolk Island between New Caledonia and New Zealand and was regarded as either extremely rare or possibly extinct. Since 2000 the Australian government has considered the species extinct.

Description It had a length up 13 to 14 centimetres and therefore it was one of the largest white-eyes ever recorded. Its wingspan was 7.5 cm and its weight was about 30 grams. Its appearance was characterised by a pale green head, an olive green coloured neck and white throat and belly parts. A further feature of the bird was a conspicuous eye ring of white feathers. Males and females were coloured similarly. Its diet consisted of fruits, berries, nectar, and insects. Its only habitat was a 5 km² large forested area around Mount Pitt on Norfolk Island where it lived solitary. In the breeding season from October to December, the couple would build a cup-shaped nest in which around two white eggs were laid. The incubation time would last eleven days and the juveniles would become fully fledged another eleven days later.

Threats The largest threats are habitat destruction and invasive species. The decline of the white-chested white-eye began as the introduced silvereye (Zosterops lateralis) became naturalised on Norfolk Island. It displaced the white-chested white-eye from its breeding range. From the 1940s, rats destroyed nests and clearing of forests led to a severe decline in the population to only 50 individuals in 1962. In 1986, the Norfolk Island National Park was established to save this bird from extinction, but because of the fluctuation of this species, surveys often remained unsuccessful. In 1978, only four individuals were monitored, and a sighting in 2000 resulted in one individual; bird watchers claimed to have seen the bird in 2005. However, official surveys have not recorded the species since 1980. A predator-exclusion fence was built around the last remaining habitat in the Norfolk Island National Park. A survey by ornithologist Guy Dutson in 2009 failed to find any individuals.

References

External links Recovery Outline White-chested White-eye (engl.) Archived 2006-09-13 at the Wayback Machine Markus Kappeler - Norfolk-Brillenvogel (German) Birdlife factsheet (engl.) Print by John Gould from the Collection Birds of Australia 1840 - 1848 Archived 2007-09-27 at the Wayback Machine

Illustrations

Worked examples

Example 1 — a first encounter with White-chested white-eye

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

In research: White-chested 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 White-chested 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: White-chested white-eye is common in secondary-school and first-year university syllabi. It links to neighbouring topics Birds described in 1837, Endemic birds of Australia, Extinct birds of Norfolk Island, so understanding it makes those chapters shorter.
In everyday life: Look for White-chested 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 White-chested white-eye in 20 minutes

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

Frequently asked questions

What is White-chested white-eye in simple terms?

Why does White-chested 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 White-chested 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 White-chested white-eye.