science

Puffleg

Puffleg 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 Puffleg rather than just read about it. In short: Pufflegs are hummingbirds from the genera Eriocnemis and Haplophaedia. They occur in humid forest, woodland and shrub at altitudes of 1000 to 4800 m. asl in the Andes of Argentina, Bolivia, Peru, Ecuador, Colombia, and Venezuela.

Key takeaways

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

Reference excerpt

Pufflegs are hummingbirds from the genera Eriocnemis and Haplophaedia. They occur in humid forest, woodland and shrub at altitudes of 1000 to 4800 m. asl in the Andes of Argentina, Bolivia, Peru, Ecuador, Colombia, and Venezuela. The males have a colorful green, coppery or blue plumage, and the females are generally somewhat duller. The most striking feature of both sexes is their dense snow-white leg puffs which consist of feather tufts that resemble woolly panties. One species – the black-thighed puffleg – is characterized by black coloured leg puffs, and another – the buff-thighed puffleg – has lightly buff-tinged leg puffs. Further common features of all species are the straight black bill and the slightly to deeply forked tail. The members of the genus Haplophaedia are generally duller than the members of Eriocnemis. While most pufflegs remain fairly common, three species (colorful puffleg, black-breasted puffleg and gorgeted puffleg) are critically endangered and one (the turquoise-throated puffleg) is possibly extinct.

Puffleg species Genus Eriocnemis Black-breasted puffleg, Eriocnemis nigrivestis Gorgeted puffleg, Eriocnemis isabellae Glowing puffleg, Eriocnemis vestitus Black-thighed puffleg, Eriocnemis derbyi Turquoise-throated puffleg, Eriocnemis godini – possibly extinct (20th century?) Coppery-bellied puffleg, Eriocnemis cupreoventris Sapphire-vented puffleg, Eriocnemis luciani Coppery-naped puffleg, Eriocnemis (luciani) sapphiropygia Golden-breasted puffleg, Eriocnemis mosquera Blue-capped puffleg, Eriocnemis glaucopoides Colorful puffleg, Eriocnemis mirabilis Emerald-bellied puffleg, Eriocnemis aline Genus Haplophaedia Greenish puffleg, Haplophaedia aureliae Buff-thighed puffleg, Haplophaedia (aureliae) assimilis Hoary puffleg, Haplophaedia lugens In addition there were the controversial species: Eriocnemis söderströmi, E. isaacsoni and E. dyselius which were each only known by one specimen. In the case of E. söderströmi it could have been either the female of E. godini or a hybrid between E. luciani and E. nigrivestris. E. dyselius was nothing more than a melanistic individual of E. cupreoventris. Today these species are considered invalid.

References Heynen, I. (1999). Eriocnemis and Haplophaedia (pufflegs). pp. 639–643 in: del Hoyo, J., Elliott, A., & Sargatal, J. eds. (1999). Handbook of the Birds of the World. Vol. 5. Barn-owls to Hummingbirds. Lynx Edicions, Barcelona. ISBN 84-87334-25-3 Systematics and biogeography of the Andean genus Eriocnemis (Aves: Trochilidae) (Abstract)

Illustrations

Worked examples

Example 1 — a first encounter with Puffleg

Start with the simplest possible case. Write down what Puffleg 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 Puffleg 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 Puffleg 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 Puffleg

In research: Puffleg 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 Puffleg 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: Puffleg is common in secondary-school and first-year university syllabi. It links to neighbouring topics Bird common names, Hummingbird stubs, Hummingbirds, so understanding it makes those chapters shorter.
In everyday life: Look for Puffleg 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 Puffleg in 20 minutes

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

Frequently asked questions

What is Puffleg in simple terms?

Why does Puffleg 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 Puffleg?

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 Puffleg.