What's That Bug? does not endorse extermination

Subject: UFO
Location: Massachusetts
May 16, 2017 1:44 pm
Found these crawling all over my house today. I live just south of Boston. There were tons of them, about a half inch long excluding antennae.
Signature: Hoping it’s harmless

Small Winter Stonefly

Dear Hoping it’s harmless,
It is.  This is a Small Winter Stonefly in the family Capniidae.  According to BugGuide:  “adults emerge from November to June (most common in winter and early spring).”  Do you live near a stream?  According to BugGuide:  “nymphs beneath rocks and gravel on the bottom of streams and rivers; adults often seen on snow, or resting on concrete bridges over streams.”  Since they are only found near very clean, well oxygenated water, their presence is a sign that the local water is not polluted.

Small Winter Stonefly

What's That Bug? does not endorse extermination
Location: Massachusetts

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