biology

Red-necked crake

Red-necked crake 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 Red-necked crake rather than just read about it. In short: The red-necked crake (Rallina tricolor) is a waterbird in the rail and crake family, Rallidae. Description The red-necked crake is a large crake (length 25 cm, wingspan 40 cm, weight 200 g).

Key takeaways

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

Reference excerpt

The red-necked crake (Rallina tricolor) is a waterbird in the rail and crake family, Rallidae.

Description The red-necked crake is a large crake (length 25 cm, wingspan 40 cm, weight 200 g). Its head, neck and breast are red-brown, with a paler version of that color on the throat. The upperparts are grey-brown, while the underparts are grey-brown with pale barring. The underwing is barred black and white, the bill green, and the legs grey-brown.

Distribution and habitat Red-necked crakes live in the Moluccas, Lesser Sundas, New Guinea lowlands and adjacent islands, and north-eastern Australia. They are found in tropical rainforests and dense vegetation close to permanent wetlands.

Behaviour

Diet The bird's diet consists of amphibians, aquatic invertebrates, crustaceans and molluscs.

Breeding The bird rests on or close to ground in dense vegetation. It lays clutches of 3-5 dull-white eggs, the incubation periods of which are around 20 days. The chicks emerge covered in black down, precocial and nidifugous.

Voice The crake makes repetitive clicking calls and soft grunts.

Conservation With a large range and no evidence of significant decline, this species is assessed as being of least concern. The species is little studied and seldom seen due to its secretive nature, but appears to be locally common in New Guinea. In Australia it has suffered declines due to habitat loss.

Gallery

References

BirdLife International. (2007). Species factsheet: Rallina tricolor. Downloaded from https://www.birdlife.org on 14/6/2007 Marchant, S.; Higgins, P.J.; & Davies, J.N. (eds). (1994). Handbook of Australian, New Zealand and Antarctic Birds. Volume 2: Raptors to Lapwings. Oxford University Press: Melbourne. ISBN 0-19-553069-1

Illustrations

Worked examples

Example 1 — a first encounter with Red-necked crake

Start with the simplest possible case. Write down what Red-necked crake 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 Red-necked crake 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 Red-necked crake 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 Red-necked crake

In research: Red-necked crake 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 Red-necked crake 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: Red-necked crake is common in secondary-school and first-year university syllabi. It links to neighbouring topics Birds described in 1858, Birds of New Guinea, Birds of New Ireland Province, so understanding it makes those chapters shorter.
In everyday life: Look for Red-necked crake 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 Red-necked crake in 20 minutes

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

Frequently asked questions

What is Red-necked crake in simple terms?

The red-necked crake (Rallina tricolor) is a waterbird in the rail and crake family, Rallidae. Description The red-necked crake is a large crake (length 25 cm, wingspan 40 cm, weight 200 g).

Why does Red-necked crake 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 Red-necked crake?

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 Red-necked crake.