biology

Granite night lizard

Granite night lizard 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 Granite night lizard rather than just read about it. In short: The granite night lizard (Xantusia henshawi), also known commonly as Henshaw's night lizard, is a species of lizard in the family Xantusiidae. The species is endemic to North America.

Key takeaways

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

Reference excerpt

The granite night lizard (Xantusia henshawi), also known commonly as Henshaw's night lizard, is a species of lizard in the family Xantusiidae. The species is endemic to North America.

Etymology The specific name, henshawi, is in honor of American naturalist Henry Wetherbee Henshaw.

Geographic range X. henshawi is found in Mexico in the Mexican state of Baja California, and also in the United States in adjacent southern California.

Description X. henshawi is flat-bodied with a broad, flat head and a soft skin. It has rounded, dark dorsal spots on a pale yellow or cream background. Its scales are granular on its dorsum, but large and squarish on the ventral surface. This lizard has large eyes with vertical pupils, and it lacks eyelids.

Habitat and behavior The granite night lizard is often found on rocky slopes with large exfoliating boulders and abundant crevices, but is occasionally found in coastal sage scrub and chaparral without boulders. It is active in crevices during the day, but moves on the surface at night.

Reproduction X. henshawi is oviparous.

See also California coastal sage and chaparral ecoregion

References

Further reading Lee JC (1976). "Xantusia henshawi Stejneger, Granite night lizard". Catalogue of American Amphibians and Reptiles (189): 1–2. Smith HM, Brodie ED Jr (1982). Reptiles of North America: A Guide to Field Identification. New York: Golden Press. 240 pp. ISBN 0-307-13666-3. (Xantusia henshawi, pp. 84–85). Stebbins RC (2003). A Field Guide to Western Reptiles and Amphibians, Third Edition. The Peterson Field Guide Series ®. Boston and New York: Houghton Mifflin Company. 533 pp. ISBN 978-0-395-98272-3. (Xantusia henshawi, p. 306 + Plate 35 + Map 77). Stejneger L (1893). "Diagnosis of a new California lizard". Proceedings of the United States National Museum 16: 467. (Xantusia henshawi, new species).

Illustrations

Worked examples

Example 1 — a first encounter with Granite night lizard

Start with the simplest possible case. Write down what Granite night lizard 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 Granite night lizard 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 Granite night lizard 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 Granite night lizard

In research: Granite night lizard 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 Granite night lizard 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: Granite night lizard is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fauna of the California chaparral and woodlands, IUCN Red List least concern species, Lizard stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Granite night lizard 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 Granite night lizard in 20 minutes

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

Frequently asked questions

What is Granite night lizard in simple terms?

The granite night lizard (Xantusia henshawi), also known commonly as Henshaw's night lizard, is a species of lizard in the family Xantusiidae. The species is endemic to North America.

Why does Granite night lizard 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 Granite night lizard?

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 Granite night lizard.