biology

North Island takahē

North Island takahē 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 North Island takahē rather than just read about it. In short: The North Island takahē (Māori: moho) (Porphyrio mantelli) is an extinct species of flightless swamphen that was native to the North Island of New Zealand. It is closely related to the living South Island takahē.

Key takeaways

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

Reference excerpt

The North Island takahē (Māori: moho) (Porphyrio mantelli) is an extinct species of flightless swamphen that was native to the North Island of New Zealand. It is closely related to the living South Island takahē.

Description This flightless species is known from subfossils from a number of sites across North Island. The North Island takahē compared to the South island species was proportionally larger, but had a smaller premaxilla (and thus beak) relative to body size. Other differences from the South island species include the more elongate tarsometatarsus bones of the legs relative to the tibiotarsus.

Taxonomy Traditionally the North Island takahē was considered conspecific with the endangered South Island takahē. Trewick (1996) suggested that the two taxa were independently derived from two separate colonisations by flying ancestors, so proved to be separate species. However, this was challenged by the result of subsequent DNA analysis, which suggested that the two takahē species were each other's closest relatives and as such probably originated from a single colonisation of New Zealand, but were divergent enough from each other to warrant being considered distinct species, with the split estimated to have occurred 4 to 1.5 million years ago.

The binomial of this bird commemorates the naturalist and civil servant Walter Mantell.

Extinction The North Island takahē became extinct sometime after Māori settlement of New Zealand around 1320 AD. Some reports have suggested that the species may have persisted until the 19th century, but this is unconfirmed. One specimen may have been taken by surveyor in the Ruahine Range in 1894 or 1898, and was recognized as one of the rare moho by elders of Ngati Muaupoko at the time. Aramoho is said to derive from the name of this bird, as the meaning of ara mohoau is 'way of the Moho'.

References

Worthy, Trevor H. & Holdaway R. N. (2002): The lost world of the Moa: Prehistoric Life of New Zealand. Indiana University Press, Bloomington. ISBN 0-253-34034-9.

External links

North Island Takahe – BirdLife Species Factsheet

Illustrations

Worked examples

Example 1 — a first encounter with North Island takahē

Start with the simplest possible case. Write down what North Island takahē 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 North Island takahē 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 North Island takahē 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 North Island takahē

In research: North Island takahē 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 North Island takahē 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: North Island takahē is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bird extinctions since 1500, Birds described in 1848, Birds of the North Island, so understanding it makes those chapters shorter.
In everyday life: Look for North Island takahē 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 North Island takahē in 20 minutes

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

Frequently asked questions

What is North Island takahē in simple terms?

Why does North Island takahē 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 North Island takahē?

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 North Island takahē.