blackfly: meaning, definition, pronunciation and examples
C1Technical/Biological, Informal (in gardening contexts)
Quick answer
What does “blackfly” mean?
A small, dark-colored biting fly, especially one of various species in the family Simuliidae.
Audio
Pronunciation
Definition
Meaning and Definition
A small, dark-colored biting fly, especially one of various species in the family Simuliidae.
In horticulture, a small black sap-sucking insect, especially the black bean aphid (Aphis fabae).
Dialectal Variation
British vs American Usage
Differences
Both varieties use the term for the biting insect. The horticultural meaning (aphid) is more common in UK gardening contexts. In the US, 'blackfly' for the aphid is less common; 'black bean aphid' is more precise.
Connotations
In both, strongly negative connotations as a pest and nuisance. In Canada and northern US, associated with severe biting swarms in spring.
Frequency
Higher frequency in regions where the insect is prevalent (e.g., Scotland, Canada, northern US).
Grammar
How to Use “blackfly” in a Sentence
The [plant] is infested with blackfly.[Blackfly] are swarming near the river.We need to spray against blackfly.Vocabulary
Collocations
Examples
Examples of “blackfly” in a Sentence
noun
British English
- The broad beans are covered in blackfly.
- Blackfly season in the Highlands starts in May.
American English
- The blackfly bites in upstate New York are terribly itchy.
- They studied the blackfly population in the stream.
adjective
British English
- We need a blackfly spray for the roses.
- It's a notorious blackfly area.
American English
- Blackfly control is important for forestry workers.
- He suffered a severe blackfly allergy.
Usage
Meaning in Context
Business
[Rare] Possibly in tourism/complaints about outdoor activities.
Academic
Common in entomology, ecology, and agricultural science texts.
Everyday
Used by gardeners, hikers, and residents in affected areas.
Technical
Precise taxonomic reference to Simuliidae or Aphis fabae.
Watch out
Common Mistakes When Using “blackfly”
- Using 'blackfly' to refer to any small black flying insect (e.g., fruit fly).
- Confusing the biting blackfly with the non-biting aphid 'blackfly'.
- Misspelling as two words: 'black fly' (acceptable but less common as a compound).
FAQ
Frequently Asked Questions
No. They are different families of insects. Blackflies are smaller, have a hump-backed appearance, and cut the skin to feed, whereas mosquitoes pierce the skin.
Yes, in tropical regions some species transmit river blindness (onchocerciasis). In temperate regions, they are mainly a biting nuisance.
For the aphid type, you can use a strong jet of water, insecticidal soap, or introduce natural predators like ladybird larvae.
There is little practical difference. 'Blackfly' is the more common compound noun, especially for the specific insects. 'Black fly' is sometimes used descriptively for any dark fly.
A small, dark-colored biting fly, especially one of various species in the family Simuliidae.
Blackfly is usually technical/biological, informal (in gardening contexts) in register.
Blackfly: in British English it is pronounced /ˈblakflʌɪ/, and in American English it is pronounced /ˈblækˌflaɪ/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No common idioms specific to 'blackfly'.]”
Learning
Memory Aids
Mnemonic
Think: 'BLACK' + 'FLY' = a dark insect that flies and is a black mark on your summer picnic.
Conceptual Metaphor
A blackfly is a 'scourge' or 'plague' (e.g., 'a plague of blackflies ruined the camping trip').
Practice
Quiz
In a British gardening context, 'blackfly' most likely refers to: