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hairstreak

American  
[hair-streek] / ˈhɛərˌstrik /

noun

  1. any small, dark butterfly of the family Lycaenidae, subfamily Theclinae, having hairlike tails on the hindwings.


hairstreak British  
/ ˈhɛəˌstriːk /

noun

  1. any small butterfly of the genus Callophrys and related genera, having fringed wings marked with narrow white streaks: family Lycaenidae

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of hairstreak

First recorded in 1810–20; hair + streak


Example Sentences

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See Examples For:

In Grenen, the northernmost point in Denmark, Ms. Korsgaard lies in the sand on her belly to inspect the lyrically named green hairstreak, its wings “jade green on the underside, with a metallic sheen.”

From The Wall Street Journal ● Sep. 11, 2026

The white-letter hairstreak – whose caterpillars glow under ultraviolet light – has fallen by 80% since the scheme began.

From BBC ● Apr. 14, 2026

Emily Coulam, from the trust, said the data gathered by the volunteers would help them "develop projects which hope to increase abundance and range of the hairstreak butterflies through habitat creation and restoration".

From BBC ● Apr. 25, 2025

They were looking for caterpillars of the UK's five species of hairstreak butterfly.

From BBC ● Apr. 25, 2025

The spokesperson said the Sheffield tree was "fortunately resistant" to the disease and was also home to the white-letter hairstreak butterfly, which had saved it from the chop during Sheffield City Council's felling programme.

From BBC ● Aug. 15, 2023

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