science

Stable fly

Stable fly 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 Stable fly rather than just read about it. In short: Stomoxys calcitrans is known by the common names stable fly, barn fly, biting house fly, dog fly, and power mower fly. Unlike most members of the family Muscidae, Stomoxys calcitrans ('sharp mouth' + 'kicking') and others of its genus suck blood from mammals.

Key takeaways

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

Reference excerpt

Stomoxys calcitrans is known by the common names stable fly, barn fly, biting house fly, dog fly, and power mower fly. Unlike most members of the family Muscidae, Stomoxys calcitrans ('sharp mouth' + 'kicking') and others of its genus suck blood from mammals. Now found worldwide, the species is considered to be of Eurasian or African origin.

Physical features The stable fly resembles the common housefly (Musca domestica), though smaller, and on closer examination has a slightly wider and spotted abdomen. Adults are generally about 6–8 mm (1⁄4–5⁄16 inch) in length and a lighter color than the housefly. Unlike the housefly, where the mouth part is adapted for sponging, the stable fly mouth parts have biting structures. An additional distinction from M. domestica is in the aristae, which bear a single, superior row of hairs in S. calcitrans instead of two opposing rows.

Habitat As its name suggests, the stable fly is abundant in and around where cattle are kept. Its maggots are often seen in the rotting manure near cattle and poultry. It also occurs in coastal areas where larvae may inhabit masses of decaying aquatic vegetation deposited ashore.

Biology

The earliest and one of the most comprehensive accounts of stable fly biology was presented by F. Bishopp in 1913. The adults of both sexes feed on the blood of warm-blooded animals during the daytime. For egg production, the female requires its abdomen to be engorged with blood. The female takes approximately 2–5 minutes to engorge, after which it becomes sluggish for a while. The eggs are laid among putrefying organic materials such as hay, manure, and wood. Males usually die after mating and the females after laying eggs. The life cycle has a duration of about two weeks at temperatures around 27 °C (81 °F). The duration is highly dependent on temperature and nutrient quality available for the larvae. Bishopp (1913) noted that the larvae can endure for more than 30 days in less nutritious environs.

Economic impact Cattle heavily infested with stable flies have been noted to become anemic and milking cows have been observed to show lower milk production. The stable fly bites humans at rest in the outdoors. In many parts of the world, the species is a carrier of trypanosomid parasites. Some of the reported parasites and diseases for which the stable fly might be a vector include Trypanosoma evansi (the agent of Surra), Trypanosoma brucei, brucellosis, equine infectious anemia, African horse sickness (AHS), Lumpy skin disease (LSD) and fowlpox. S. calcitrans is also reported to be a vector of Bacillus anthracis, the causative agent of anthrax.

References

External links

University of Michigan

Illustrations

Worked examples

Example 1 — a first encounter with Stable fly

Start with the simplest possible case. Write down what Stable fly 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 Stable fly 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 Stable fly 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 Stable fly

In research: Stable fly 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 Stable fly 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: Stable fly is common in secondary-school and first-year university syllabi. It links to neighbouring topics Animal taxa named by Carl Linnaeus, Flies of Europe, Flies of New Zealand, so understanding it makes those chapters shorter.
In everyday life: Look for Stable fly 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 Stable fly in 20 minutes

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

Frequently asked questions

What is Stable fly in simple terms?

Why does Stable fly 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 Stable fly?

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 Stable fly.