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hairstreak

American

[hair-streek] / ˈhɛərˌstrik /

noun

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

hairstreak British

/ ˈhɛəˌstriːk /

noun

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:

hairstreak

According to The UK Butterfly Monitoring Scheme, butterflies are in sharp decline, with the white-letter hairstreak species falling by 80% since the survey began in 1973.

From BBC ● Apr. 16, 2026

So far, 11 hairstreak butterflies and three hairstreak caterpillars have been spotted in the area.

From BBC ● Apr. 16, 2026

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

From BBC ● Apr. 14, 2026

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

In Northern Ireland and the Isle of Man similar measures are in place to protect species, including the dingy skipper and the purple hairstreak.

From BBC ● Jun. 29, 2018

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023