black fly: meaning, definition, pronunciation and examples
C1informal, scientific, regional
Quick answer
What does “black fly” mean?
A small, dark-colored biting fly, often of the family Simuliidae, known for its painful bite and potential to transmit diseases.
Audio
Pronunciation
Definition
Meaning and Definition
A small, dark-colored biting fly, often of the family Simuliidae, known for its painful bite and potential to transmit diseases.
Can refer to various small, dark flying insects that are pests, especially in agricultural, outdoor, or nuisance contexts.
Dialectal Variation
British vs American Usage
Differences
In the UK, 'black fly' commonly refers to the blackfly aphid (Aphis fabae), a garden pest. In North America, it almost exclusively refers to the biting fly of the family Simuliidae.
Connotations
In North America, connotes painful bites, swarms, and a nuisance in wooded areas near water. In the UK, connotes garden infestation and damage to plants like beans.
Frequency
More frequent in North American English due to the prevalence of the biting insect. In UK English, 'greenfly' is more common for aphids; 'black fly' is specific to the dark species.
Grammar
How to Use “black fly” in a Sentence
The [noun] was covered in black flies.We were bitten by black flies.Black flies breed in [flowing water].Vocabulary
Collocations
Examples
Examples of “black fly” in a Sentence
noun
British English
- The broad bean plants are suffering from a severe black fly attack.
- A cloud of black flies descended on the picnic.
American English
- The black fly season in Maine runs from late May through June.
- I have three itchy black fly bites on my ankle.
Usage
Meaning in Context
Business
Rare, except in pest control, tourism (complaints about outdoor activities), or agriculture.
Academic
Used in entomology, ecology, parasitology, and public health texts.
Everyday
Used by hikers, gardeners, farmers, and residents in affected regions to describe a nuisance pest.
Technical
Precise reference to species in the Simuliidae family, detailing life cycle, disease vectors (e.g., river blindness), and control methods.
Watch out
Common Mistakes When Using “black fly”
- Using 'black fly' for a common housefly. Using it as a singular count noun ('a black fly bit me') is correct, but the pest is often discussed in the plural ('black flies are terrible this year').
FAQ
Frequently Asked Questions
They are similar small, biting flies, but entomologically distinct. 'Black fly' usually refers specifically to Simuliidae, while 'midge' can refer to various families like Ceratopogonidae (biting midges). In everyday language, they are often confused.
Yes, in some parts of the world (notably Africa and Latin America), certain species transmit the parasitic worm that causes river blindness (onchocerciasis). In North America and Europe, their bites are painful and itchy but rarely transmit disease to humans.
Wear light-colored, long-sleeved clothing, use insect repellent containing DEET or picaridin, and avoid being outdoors during peak activity times (often dawn and dusk) near their breeding grounds (fast-flowing streams).
They are often used interchangeably. 'Blackfly' (one word) is a common alternative spelling, especially in compound terms like 'blackfly aphid'. In formal writing, the two-word form 'black fly' is frequently used for the biting insect.
A small, dark-colored biting fly, often of the family Simuliidae, known for its painful bite and potential to transmit diseases.
Black fly is usually informal, scientific, regional in register.
Black fly: in British English it is pronounced /blæk flaɪ/, and in American English it is pronounced /blæk flaɪ/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No common idioms specific to 'black fly'. The phrase is typically literal.]”
Learning
Memory Aids
Mnemonic
Think: BLACK clothing attracts these FLIES. Or: A tiny BLACK cloud that FLIES and bites.
Conceptual Metaphor
A black fly is often a metaphor for a persistent, annoying, but small problem that is hard to eradicate.
Practice
Quiz
In a British gardening context, 'black fly' most likely refers to: