science

Heliantheini

Heliantheini 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 Heliantheini rather than just read about it. In short: Heliantheini is one of the two tribes that make up the subfamily Lesbiinae of the hummingbird family Trochilidae. The other tribe in the subfamily is Lesbiini.

Key takeaways

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

Reference excerpt

Heliantheini is one of the two tribes that make up the subfamily Lesbiinae of the hummingbird family Trochilidae. The other tribe in the subfamily is Lesbiini. The informal name "brilliants" has been proposed for this group as it includes the genus Heliodoxa that has nine species with "brilliant" in their common name. The tribe contains 53 species divided into 14 genera.

Phylogeny A molecular phylogenetic study of the hummingbirds published in 2007 found that the family was composed of nine major clades. When Edward Dickinson and James Van Remsen, Jr. updated the Howard and Moore Complete Checklist of the Birds of the World for the 4th edition in 2013 they divided the hummingbirds into six subfamilies and proposed using the name Heliantheini for one of the two tribes in the subfamily Lesbiinae. The tribe Heliantheini had been introduced (as a subfamily Heliantheinae) by the German naturalist Ludwig Reichenbach in 1854.

Cladogram Molecular phylogenetic studies by Jimmy McGuire and collaborators published between 2007 and 2014 determined the relationships between the major groups of hummingbirds. In the cladogram below the English names are those introduced in 1997. The Latin names are those proposed by Dickinson and Remsen in 2013.

The phylogeny of the Heliantheini based on a molecular phylogenetic study published in 2014 is shown below. Loddigesia (marvelous spatuletail) was found to be embedded within Eriocnemis.

Taxonomic list The tribe contains 14 genera.

References

Sources

Illustrations

Worked examples

Example 1 — a first encounter with Heliantheini

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

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

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

Frequently asked questions

What is Heliantheini in simple terms?

Heliantheini is one of the two tribes that make up the subfamily Lesbiinae of the hummingbird family Trochilidae. The other tribe in the subfamily is Lesbiini.

Why does Heliantheini 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 Heliantheini?

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 Heliantheini.