science

Jamaican ibis

Jamaican ibis is a science 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 Jamaican ibis rather than just read about it. In short: The Jamaican ibis, Jamaican flightless ibis or clubbed-wing ibis (Xenicibis xympithecus) is an extinct bird species of the ibis subfamily uniquely characterized by its club-like wings. It is the only species in the genus Xenicibis, and one of only two flightless ibis genera, the other being the genus Apteribis which was endemic to Hawaii's islands of Maui Nui.

Key takeaways

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

Reference excerpt

The Jamaican ibis, Jamaican flightless ibis or clubbed-wing ibis (Xenicibis xympithecus) is an extinct bird species of the ibis subfamily uniquely characterized by its club-like wings. It is the only species in the genus Xenicibis, and one of only two flightless ibis genera, the other being the genus Apteribis which was endemic to Hawaii's islands of Maui Nui.

Description The species was first described in 1977 based on postcranial bone elements excavated in a cave deposit at Long Mile Cave, Jamaica, by H. E. Anthony in 1919–20. At the time, it was presumed to be flightless based on the incomplete coracoid; its flightlessness was confirmed after a humerus of the same species was found in the Swansea Cave, Jamaica. New fossil finds from two locations, including the Red Hills Fissure, show that the bird has a unique modification of the carpometacarpus, rendering it club-like. The metacarpal is enlarged and bowed distally with thickened walls, while the ulna and radius have been modified as well. From its maximum femur diameter of 8.7 mm, it has been estimated that the Jamaican Ibis weighed about 2 kg (70 oz).

Clubbed wing function Ornithologists speculate that the wings were used as weapons, in the manner of a club or flail, similar to the adaptations found in some mantis shrimps (Stomatopoda: Gonodactyloidea) that possess a club-like distally inflated dactyl used to strike prey and other shrimps. Among birds, this adaption seems unique. In birds, adaptations of the wing that are advantageous in the context of fighting represent an example of contingency in which species find different solutions to the same problem as a result of random variations.

Distribution

The Jamaican ibis was endemic to Jamaica. Bones have been excavated from several caves, including the Long Mile Cave, the Swansea Cave, the Jackson's Bay Cave and the Red Hills Fissure. Bones from Cuba claimed to be of this genus were later identified as those of a limpkin. Jamaica and Cuba have never been linked, so it is improbable that a flightless species could reach a different island.

References

Illustrations

Worked examples

Example 1 — a first encounter with Jamaican ibis

Start with the simplest possible case. Write down what Jamaican ibis claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Jamaican ibis 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 Jamaican ibis 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 Jamaican ibis

In research: Jamaican ibis appears in science 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 Jamaican ibis 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: Jamaican ibis is common in secondary-school and first-year university syllabi. It links to neighbouring topics Extinct animals of Jamaica, Extinct birds of the Caribbean, Extinct flightless birds, so understanding it makes those chapters shorter.
In everyday life: Look for Jamaican ibis 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 Jamaican ibis in 20 minutes

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

Frequently asked questions

What is Jamaican ibis in simple terms?

Why does Jamaican ibis matter?

Because it connects several science 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 Jamaican ibis?

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 Jamaican ibis.