The White M Hairstreak is a stunning hairstreak with iridescent royal blue upper wings and a distinctive white M or W mark on the underside of the hindwing. It inhabits mature oak forests and adults tend to perch in the treetops, making them a sought-after find when they descend to nectar. Males are sometimes seen mud-puddling.
Best time to see a White M Hairstreak
The best time to see a White M Hairstreak is April–August, when about 62% of U.S. sightings happen, based on 2,996 research-grade iNaturalist observations.
Not certain it is a White M Hairstreak? What bug is this? walks through what to check first and the lookalikes that catch people out.
Recent White M Hairstreak sightings near you
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