science

Midge

Midge 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 Midge rather than just read about it. In short: A midge is any small fly, including species in several families of non-mosquito nematoceran Diptera. Midges are found (seasonally or otherwise) on practically every land area outside permanently arid deserts and the frigid zones.

Key takeaways

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

Reference excerpt

A midge is any small fly, including species in several families of non-mosquito nematoceran Diptera. Midges are found (seasonally or otherwise) on practically every land area outside permanently arid deserts and the frigid zones. Some midges, such as many Phlebotominae (sand fly) and Simuliidae (black fly), are vectors of various diseases. Many others play useful roles as prey for insectivores, such as various frogs and swallows. Others are important as detritivores, and form part of various nutrient cycles. The habits of midges vary greatly from species to species, though within any given family midges commonly have similar ecological roles. Examples of families that include species of midges include:

Blephariceridae, net-winged midges Cecidomyiidae, gall midges Ceratopogonidae, biting midges (also known as no-see-ums or punkies in North America and sandflies in Australia) Chaoboridae, phantom midges Chironomidae, non-biting midges (also known as muckleheads, muffleheads or lake flies in the Great Lakes region of North America) Deuterophlebiidae, mountain midges Dixidae, meniscus midges Scatopsidae, dung midges Thaumaleidae, solitary midges

Examples The Ceratopogonidae (biting midges) include serious blood-sucking pests, feeding on humans and other mammals. Some of them spread diseases that plague livestock, such as blue tongue and African horse sickness. Other species are at least partly nectar feeders, and some even suck bodily fluids of other insects. Many midges are known for having symbiotic relationships with many other organisms. These can be commensal, parasitic or mutualistic relationships. Many of the commensal relationships are found within the family Chironomidae.

Other ceratopogonid midges are major pollinators of Theobroma cacao (cocoa tree). Having natural pollinators has beneficial effects in both agricultural and biological products because it increases crop yield and also density of predators of the midges (still beneficial to all parties). The term "midge" is a vague term that refers to a large and diverse group of organisms. Although many are known as "bloodsuckers," there are many different roles that they play in their respective ecosystems. There is, for example, no objective basis for excluding the Psychodidae from the list, and some of them (or midge-like taxa commonly included in the family, such as Phlebotomus) are blood-sucking pests and disease vectors. Most midges, apart from the gall midges (Cecidomyiidae), are aquatic during the larval stage. Some Cecidomyiidae (e.g., the Hessian fly) are considered significant pests of some plant species. The larvae of some Chironomidae contain hemoglobin and are sometimes referred to as bloodworms. Non-biting midge flies are commonly considered a minor nuisance around bodies of water. In May 2025, a large emergence of midges caused mayhem at the World Exposition in Osaka, Japan.

Illustrations

Worked examples

Example 1 — a first encounter with Midge

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

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

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

Frequently asked questions

What is Midge in simple terms?

Why does Midge 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 Midge?

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 Midge.