A female Arched Hooktip Moth in Prince George's Co., Maryland (4/18/2004). Specimen provided by Bob Patterson/MPG.
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Media by
Larry Line.
A female Arched Hooktip Moth from below in Prince George's Co., Maryland (4/18/2004). Specimen provided by Bob Patterson/MPG.
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Media by
Larry Line.
Arched Hooktip Moth caterpillar making a cocoon in an alder leaf in Howard Co., Maryland (9/24/2014).
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Media by
Bonnie Ott.
An Arched Hooktip Moth caterpillar in Frederick Co., Maryland (9/15/2017). Verified by Roger Downer/BAMONA.
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Media by
Mark Etheridge.
The wingspan is 24–40 millimetres (0.94–1.57 in). Adults are on wing from mid-May through late-July. There is one generation per year in the north.
The larvae feed on Betula papyrifera and Alnus species, which they may use as a medium to communicate. Sound is produced by shaking their bodies, drumming and scraping their mouthparts, or dragging specialised anal "oars" against the surface of a leaf. Larvae build communal silk shelters and the sounds may attract other larva to the shelter.[2]