biology

Red-gartered coot

Red-gartered coot 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-gartered coot rather than just read about it. In short: The red-gartered coot (Fulica armillata) is a species of bird in subfamily Rallinae of family Rallidae, the rails, gallinules, and coots. It is found in Argentina, Brazil, Chile, Paraguay, and Uruguay.

Key takeaways

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

Reference excerpt

The red-gartered coot (Fulica armillata) is a species of bird in subfamily Rallinae of family Rallidae, the rails, gallinules, and coots. It is found in Argentina, Brazil, Chile, Paraguay, and Uruguay.

Taxonomy and systematics The red-gartered coot is monotypic.

Description The red-gartered coot is 43 to 51 cm (17 to 20 in) long. The sexes are alike. Adults have a yellow bill and frontal shield with a patch of red between them. (The bill is sometimes reddish.) Their legs are orange-yellow to yellow with a pale red "garter" above the ankle. Their plumage is slaty gray that is blacker on the head and neck. Their undertail coverts are white. Immature birds have a paler bill than adults and olive legs and feet. Juveniles are drab gray-brown with dusky mottling on a white head and neck.

Distribution and habitat The red-gartered coot is found from central and southern Chile, Paraguay, and southeastern Brazil south through Argentina to Tierra del Fuego. It has reached the Falkland Islands as a vagrant, and sight records in Bolivia lead the South American Classification Committee of the American Ornithological Society to classify it as hypothetical in that country. Fossils of this species are known from the Laguna de Tagua Tagua formation of Chile. The red-gartered coot inhabits large ponds, lakes, rivers, and marshes, and in winter sheltered marine bays. It is generally a bird of the lowlands but occurs up to about 1,200 m (3,900 ft) in Patagonia, to 1,000 m (3,300 ft) in the southern Andes, and as high as 2,100 m (6,900 ft) in northwestern Argentina.

Behavior

Movement The red-gartered coot is believed to be mostly sedentary but does make some local movements and has strayed from its normal range.

Feeding The red-gartered coot feeds primarily on aquatic plants, mostly by diving in open water but also upends like a duck in shallower water. It also grazes on land near water.

Breeding The red-gartered coot's breeding season varies geographically, but is generally within September to November. It is monogamous and when breeding it is aggressive and territorial, though outside that season it is gregarious. It builds a loose platform nest of dried rushes with a rim, usually attached to rushes but sometimes floating. The clutch size is two to eight eggs; both parents incubate the eggs and care for the young.

Vocalization Male red-gartered coots make a "whistled 'huit'" alarm call, in aggression "an explosive 'pit' and repeated 'wuw'", and when near a female a "repeated soft 'cuit'". The female's alarm call is "yec" and it also makes a "loud, repeated 'terr'."

Status The IUCN has assessed the red-gartered coot as being of Least Concern, though its population size and trend are not known. No immediate threats have been identified. It is considered common.

References

Illustrations

Worked examples

Example 1 — a first encounter with Red-gartered coot

Start with the simplest possible case. Write down what Red-gartered coot 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-gartered coot 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-gartered coot 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-gartered coot

In research: Red-gartered coot 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-gartered coot 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-gartered coot is common in secondary-school and first-year university syllabi. It links to neighbouring topics Birds described in 1817, Birds of Argentina, Birds of Chile, so understanding it makes those chapters shorter.
In everyday life: Look for Red-gartered coot 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-gartered coot in 20 minutes

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

Frequently asked questions

What is Red-gartered coot in simple terms?

Why does Red-gartered coot 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-gartered coot?

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-gartered coot.