biology

List of cranes

List of cranes 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 List of cranes rather than just read about it. In short: Cranes are tall wading birds in the family Gruidae. Cranes are found on every continent except for South America and Antarctica and inhabit a variety of open habitats, although most species prefer to live near water.

Key takeaways

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

Reference excerpt

Cranes are tall wading birds in the family Gruidae. Cranes are found on every continent except for South America and Antarctica and inhabit a variety of open habitats, although most species prefer to live near water. They are large birds with long necks and legs, a tapering form, and long secondary feathers on the wing that project over the tail. Most species have muted gray or white plumages, marked with black, and red bare patches on the face, but the crowned cranes of the genus Balearica have vibrantly-coloured wings and golden "crowns" of feathers. Cranes fly with their necks extended outwards instead of bent into an S-shape (differentiating them from the similar-looking herons) and their long legs outstretched. They also have musical, long-reaching calls and elaborate courtship displays. Cranes are threatened by habitat loss, intentional hunting, and the wildlife trade. The Siberian crane, with an estimated population of 3,500–4,000 mature individuals, is considered critically endangered due to the construction of dams that threaten one of its main wintering grounds. Two other species are considered endangered, seven are considered vulnerable, and one is considered near-threatened. The species with the smallest estimated population is the whooping crane, which is conservatively thought to number 50–249 mature individuals, and the one with the largest is the sandhill crane, which has an estimated population of 450,000–550,000 mature individuals. There are currently 15 extant species of crane recognised by the International Ornithologists' Union distributed among four genera. The cranes are most closely related to the family Aramidae, which contains a single extant species, the limpkin. These two families, together with the trumpeters, rails, and finfoots, comprise the order Gruiformes. Many species of fossil cranes are known from the Eocene onwards; however, their exact number and taxonomy are unsettled due to ongoing discoveries.

Conventions

Conservation status codes listed follow the International Union for Conservation of Nature (IUCN) Red List of Threatened Species. Range maps are provided wherever possible; if a range map is not available, a description of the crane's range is provided. Ranges are based on the IOC World Bird List for that species unless otherwise noted. Population estimates are of the number of mature individuals and are taken from the IUCN Red List. This list follows the taxonomic treatment (designation and order of species) and nomenclature (scientific and common names) of version 13.2 of the IOC World Bird List. Where the taxonomy proposed by the IOC World Bird List conflicts with the taxonomy followed by the IUCN or the 2023 edition of The Clements Checklist of Birds of the World, the disagreement is noted next to the species's common name (for nomenclatural disagreements) or scientific name (for taxonomic disagreements).

Classification The International Ornithologists' Union (IOU) recognises 15 species of cranes in four genera. This list does not include hybrid species, extinct prehistoric species, or putative species not yet accepted by the IOU. The cranes are divided into two subfamilies, which diverged from each other around 31 million years ago: Balearicinae, containing the genus Balearica, and Gruinae, containing the genera Leucogeranus, Antigone, and Grus. Grus is sometimes further divided into three distinct genera, with the wattled crane being split out as Bugeranus and the blue and demoiselle cranes being split out as Anthropoides.

Subfamily Balearicinae Genus Balearica: two species Subfamily Gruinae Genus Leucogeranus: one species Genus Antigone: four species Genus Grus: eight species

Gruids

Notes

References

Illustrations

Worked examples

Example 1 — a first encounter with List of cranes

Start with the simplest possible case. Write down what List of cranes 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 List of cranes 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 List of cranes 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 List of cranes

In research: List of cranes 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 List of cranes 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: List of cranes is common in secondary-school and first-year university syllabi. It links to neighbouring topics Gruidae, Lists of animal species, Lists of birds, so understanding it makes those chapters shorter.
In everyday life: Look for List of cranes 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 List of cranes in 20 minutes

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

Frequently asked questions

What is List of cranes in simple terms?

Why does List of cranes 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 List of cranes?

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 List of cranes.