A Walnut Caterpillar Moth in Howard Co., Maryland (6/21/2013).

View Record Details Photo by Nancy Magnusson MBP List

A Walnut Caterpillar Moth in Anne Arundel Co., Maryland (7/1/2016).

View Record Details Photo by Robert Aguilar, SERC MBP List

A Walnut Caterpillar Moth in Frederick Co., Maryland (8/11/2017). Verified by Roger Downer/BAMONA.

View Record Details Photo by Mark Etheridge MBP List

Walnut Caterpillar Moth in Washington Co., Maryland (7/23/2022). (c) Frode Jacobsen, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 611177 - Psn: 44)

Walnut Caterpillar Moth in Washington Co., Maryland (7/23/2022). (c) Frode Jacobsen, some rights reserved (CC BY-NC).

View Record Details Photo by Frode Jacobsen MBP List

A Walnut Caterpillar Moth in Anne Arundel Co., Maryland (6/11/2019).

View Record Details Photo by Tyler Bell MBP List

Walnut Caterpillar Moth in Frederick Co., Maryland (7/2/2021). (c) Emilio Concari, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 764171 - Psn: 54)

Walnut Caterpillar Moth in Frederick Co., Maryland (7/2/2021). (c) Emilio Concari, some rights reserved (CC BY-NC).

View Record Details Photo by Emilio Concari MBP List

Walnut Caterpillar Moth in Frederick Co., Maryland (6/22/2018). (c) Mark Etheridge, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 374863 - Psn: 55)

Walnut Caterpillar Moth in Frederick Co., Maryland (6/22/2018). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Walnut Caterpillar Moth in Frederick Co., Maryland (7/2/2021). (c) Emilio Concari, some rights reserved (CC BY-NC).

View Record Details Photo by Emilio Concari MBP List

A Walnut Caterpillar Moth in Howard Co., Maryland (7//2003).

View Record Details Photo by Larry Line MBP List

A Walnut Caterpillar Moth in Howard Co., Maryland (7//2003).

View Record Details Photo by Larry Line MBP List

A Walnut Caterpillar Moth in Howard Co., Maryland (7//2003).

View Record Details Photo by Larry Line MBP List

A Walnut Caterpillar Moth collected in Frederick Co., Maryland (6/25/2001).

View Record Details Photo by Mark Etheridge MBP List

Walnut Caterpillar Moth in Montgomery Co., Maryland (9/16/2022). (c) Jim Moore (Maryland), some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 650933 - Psn: 125)

Walnut Caterpillar Moth in Montgomery Co., Maryland (9/16/2022). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC).

View Record Details Photo by Jim Moore MBP List

Walnut Caterpillar Moth in Baltimore Co., Maryland (7/28/2020). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 944650 - Psn: 125)

Walnut Caterpillar Moth in Baltimore Co., Maryland (7/28/2020). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Walnut Caterpillar Moth in Montgomery Co., Maryland (9/16/2022). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC).

View Record Details Photo by Jim Moore MBP List

Walnut Caterpillar Moth in Howard Co., Maryland (7/27/2019). (c) Timothy Reichard, all rights reserved. (Photo ID: 268338 - Psn: 132)

View Record Details Photo by Timothy Reichard MBP List

Walnut Caterpillar Moth in Anne Arundel Co., Maryland (8/15/2021). (c) Timothy Reichard, all rights reserved. (Photo ID: 537893 - Psn: 132)

View Record Details Photo by Timothy Reichard MBP List

A Walnut Caterpillar Moth caterpillar in Washington Co., Maryland (9/28/2019). Determined by George Smiley/BugGuide.

View Record Details Photo by Jim Moore MBP List

Walnut Caterpillar Moth in Anne Arundel Co., Maryland (8/15/2021). (c) Timothy Reichard, all rights reserved. (Photo ID: 537895 - Psn: 135)

View Record Details Photo by Timothy Reichard MBP List

Walnut Caterpillar Moth in Baltimore City, Maryland (7/23/2019). (c) goodloeerin, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 761124 - Psn: 135)

Walnut Caterpillar Moth in Baltimore City, Maryland (7/23/2019). (c) goodloeerin, some rights reserved (CC BY-NC).

View Record Details Photo by goodloeerin via iNaturalist MBP List

Walnut Caterpillar Moth in Montgomery Co., Maryland (8/1/2019). (c) jraiford, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by/4.0/'>CC BY</a>). (Photo ID: 761118 - Psn: 145)

Walnut Caterpillar Moth in Montgomery Co., Maryland (8/1/2019). (c) jraiford, some rights reserved (CC BY).

View Record Details Photo by jraiford via iNaturalist MBP List

A Walnut Caterpillar Moth caterpillar in Baltimore City, Maryland (9/9/2010).

View Record Details Photo by Thomas Wilson MBP List

A Walnut Caterpillar Moth larva in Baltimore Co., Maryland (8/9/2020). Verified by Roger Downer/BAMONA.

View Record Details Photo by Dave Webb MBP List

Walnut Caterpillar Moth in Carroll Co., Maryland (9/13/2022). (c) mpsmithluther, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 760303 - Psn: 155)

Walnut Caterpillar Moth in Carroll Co., Maryland (9/13/2022). (c) mpsmithluther, some rights reserved (CC BY-NC).

View Record Details Photo by mpsmithluther via iNaturalist MBP List

Walnut Caterpillar Moth in Anne Arundel Co., Maryland (6/21/2024). (c) Timothy Reichard, all rights reserved. (Photo ID: 1164065 - Psn: 155)

View Record Details Photo by Timothy Reichard MBP List

A Walnut Caterpillar Moth caterpillar in Juniata Co., Pennsylvania (8/17/2013).

View Record Details Photo by Timothy Reichard MBP List

Walnut caterpillars in Howard Co., Maryland (9/11/2014).

View Record Details Photo by Richard Orr MBP List

Walnut Caterpillar Moth eggs in Frederick Co., Maryland (7/10/2011). Determined by Charley Eiseman/BugGuide.

View Record Details Photo by Bob Cammarata MBP List

Walnut Caterpillar Moth in Washington Co., Maryland (8/8/2020). (c) chipp, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 207669 - Psn: 200)

Walnut Caterpillar Moth in Washington Co., Maryland (8/8/2020). (c) chipp, some rights reserved (CC BY-NC).

Photo by chipp via iNaturalist MBP List

Walnut Caterpillar Moth eggs in Frederick Co., Maryland (7/10/2011). Determined by Charley Eiseman/BugGuide.

View Record Details Photo by Bob Cammarata MBP List

Walnut Caterpillar on Black Walnut in Howard Co., Maryland (9/10/2013).

View Record Details Photo by Richard Orr MBP List

Walnut Caterpillar Moth in Anne Arundel Co., Maryland (8/15/2021). (c) Timothy Reichard, all rights reserved. (Photo ID: 537897 - Psn: 222)

View Record Details Photo by Timothy Reichard MBP List

Map Snapshot

175 Records

GA AL WA FR CL MO HO BA BC HA CE PG AA CV CH SM KE QA CN TA DO WI SO WO

Relationships

Host plants include Black Walnut, other walnut species, and hickory (Database of the World's Lepidopteran Hostplants, Miller et al., 2018).

Seasonality Summary

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Resources

View at iNaturalist Search Google Images Search MBP Facebook posts

View images at BugGuide View in Moth Photographers Group

Citations

No citations linked for this taxon yet.

Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.

A Walnut Caterpillar Moth in Howard Co., Maryland (6/21/2013). View Record Details Media by Nancy Magnusson.

A Walnut Caterpillar Moth in Anne Arundel Co., Maryland (7/1/2016). View Record Details Media by Robert Aguilar, SERC.

A Walnut Caterpillar Moth in Frederick Co., Maryland (8/11/2017). Verified by Roger Downer/BAMONA. View Record Details Media by Mark Etheridge.

Walnut Caterpillar Moth in Washington Co., Maryland (7/23/2022). (c) Frode Jacobsen, some rights reserved (CC BY-NC). View Record Details Media by Frode Jacobsen.

A Walnut Caterpillar Moth in Anne Arundel Co., Maryland (6/11/2019). View Record Details Media by Tyler Bell.

Walnut Caterpillar Moth in Frederick Co., Maryland (7/2/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). View Record Details Media by Emilio Concari.

Walnut Caterpillar Moth in Frederick Co., Maryland (6/22/2018). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Walnut Caterpillar Moth in Frederick Co., Maryland (7/2/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). View Record Details Media by Emilio Concari.

A Walnut Caterpillar Moth in Howard Co., Maryland (7//2003). View Record Details Media by Larry Line.

A Walnut Caterpillar Moth collected in Frederick Co., Maryland (6/25/2001). View Record Details Media by Mark Etheridge.

Walnut Caterpillar Moth in Montgomery Co., Maryland (9/16/2022). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC). View Record Details Media by Jim Moore.

Walnut Caterpillar Moth in Baltimore Co., Maryland (7/28/2020). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Walnut Caterpillar Moth in Montgomery Co., Maryland (9/16/2022). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC). View Record Details Media by Jim Moore.

A Walnut Caterpillar Moth caterpillar in Washington Co., Maryland (9/28/2019). Determined by George Smiley/BugGuide. View Record Details Media by Jim Moore.

Walnut Caterpillar Moth in Baltimore City, Maryland (7/23/2019). (c) goodloeerin, some rights reserved (CC BY-NC). View Record Details Media by goodloeerin via iNaturalist.

Walnut Caterpillar Moth in Montgomery Co., Maryland (8/1/2019). (c) jraiford, some rights reserved (CC BY). View Record Details Media by jraiford via iNaturalist.

A Walnut Caterpillar Moth caterpillar in Baltimore City, Maryland (9/9/2010). View Record Details Media by Thomas Wilson.

A Walnut Caterpillar Moth larva in Baltimore Co., Maryland (8/9/2020). Verified by Roger Downer/BAMONA. View Record Details Media by Dave Webb.

Walnut Caterpillar Moth in Carroll Co., Maryland (9/13/2022). (c) mpsmithluther, some rights reserved (CC BY-NC). View Record Details Media by mpsmithluther via iNaturalist.

A Walnut Caterpillar Moth caterpillar in Juniata Co., Pennsylvania (8/17/2013). View Record Details Media by Timothy Reichard.

Walnut caterpillars in Howard Co., Maryland (9/11/2014). View Record Details Media by Richard Orr.

Walnut Caterpillar Moth eggs in Frederick Co., Maryland (7/10/2011). Determined by Charley Eiseman/BugGuide. View Record Details Media by Bob Cammarata.

Walnut Caterpillar Moth in Washington Co., Maryland (8/8/2020). (c) chipp, some rights reserved (CC BY-NC). Media by chipp via iNaturalist.

Walnut Caterpillar Moth eggs in Frederick Co., Maryland (7/10/2011). Determined by Charley Eiseman/BugGuide. View Record Details Media by Bob Cammarata.

Walnut Caterpillar on Black Walnut in Howard Co., Maryland (9/10/2013). View Record Details Media by Richard Orr.