A Western Conifer Seed Bug in Worcester Co., Maryland (10/18/2013).

View Record Details Photo by Scott Housten MBP List

Western Conifer Seed Bug in Montgomery Co., Maryland (10/15/2014).

Photo by Steve Scholnick MBP List

A Western Conifer Seed Bug on Assateague Island, Maryland (11/9/2013).

Photo by Bill Hubick MBP List

A Western Conifer Seed Bug in Carroll Co., Maryland (10/9/2020).

View Record Details Photo by Barbara Speckart MBP List

A Western Conifer Seed Bug in Harford Co., Maryland (10/13/2015).

View Record Details Photo by Dave Webb MBP List

Western Conifer Seed Bug in Worcester Co., Maryland (10/13/2013).

View Record Details Photo by Scott Housten MBP List

A Western Conifer Seed Bug in Frederick Co., Maryland (6/11/2014).

Photo by Mark Etheridge MBP List

A Western Conifer Seed Bug in Baltimore Co., Maryland (10/14/2015). Verified by Brandon Woo/BugGuide.

View Record Details Photo by Emily Stanley MBP List

A Western Conifer Seed Bug in Cecil Co., Maryland (10/1/2013).

Photo by Bill Keim MBP List

A Western Conifer Seed Bug in Prince George's Co., Maryland (10/18/2016). Verified by Ross Hill/BugGuide.

View Record Details Photo by Barbara Thurlow MBP List

A Western Conifer Seed Bug in Harford Co., Maryland (10/19/2019).

View Record Details Photo by Dave Webb MBP List

A Western Conifer Seed Bug in Worcester Co., Maryland (9/23/2013). Verified by Margarethe Brummermann/BugGuide.

View Record Details Photo by Scott Housten MBP List

Western Conifer Seed Bug in Montgomery Co., Maryland (3/26/2020). (c) Jane Hartman, all rights reserved. (Photo ID: 284303 - Psn: 55)

View Record Details Photo by Jane Hartman MBP List

Western Conifer Seed Bug in Caroline Co., Maryland (11/6/2016).

View Record Details Photo by Wayne Longbottom MBP List

Western Conifer Seed Bug in Garrett Co., Maryland (11/3/2022). (c) maryland adventure babe, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 678275 - Psn: 66)

Western Conifer Seed Bug in Garrett Co., Maryland (11/3/2022). (c) maryland adventure babe, some rights reserved (CC BY-NC).

View Record Details Photo by maryland_adventure_babe via iNaturalist MBP List

A Western Conifer Seed Bug in Worcester Co., Maryland (10/12/2014).

View Record Details Photo by Scott Housten MBP List

Western Conifer Seed Bug in Howard Co., Maryland (10/29/2019). (c) smuller, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 481892 - Psn: 78)

Western Conifer Seed Bug in Howard Co., Maryland (10/29/2019). (c) smuller, some rights reserved (CC BY-NC).

View Record Details Photo by Sue Muller MBP List

A Western Conifer Seed Bug in Howard Co., Maryland (6/31/2014).

Photo by June Tveekrem MBP List

A Western Conifer Seed Bug in St. Mary's Co., Maryland (11/6/2016).

View Record Details Photo by Tyler Bell MBP List

Western Conifer Seed Bug in Baltimore City, Maryland (3/21/2020).

View Record Details Photo by Kirsten Johnson MBP List

Western Conifer Seed Bug in Baltimore City, Maryland (3/21/2020).

View Record Details Photo by Kirsten Johnson MBP List

Western Conifer Seed Bug in Montgomery Co., Maryland (Date obscured). (c) Stella Tea, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1197826 - Psn: 200)

Western Conifer Seed Bug in Montgomery Co., Maryland (Date obscured). (c) Stella Tea, some rights reserved (CC BY-NC).

View Record Details Photo by Stella Tea (stazandgazer) via iNaturalist MBP List

Western Conifer Seed Bug in Maryland (Date obscured). (c) reager11, all rights reserved (Photo ID: 1392005 - Psn: 200)

View Record Details Photo by reager11 via iNaturalist MBP List

Western Conifer Seed Bug in Calvert Co., Maryland (10/18/2025). (c) Samantha Berman, all rights reserved (Photo ID: 1392006 - Psn: 200)

View Record Details Photo by Samantha Berman via iNaturalist MBP List

Western Conifer Seed Bug in Prince George's Co., Maryland (10/18/2025). (c) evagkatz, some rights reserved (CC BY-NC)

View Record Details Photo by evagkatz via iNaturalist MBP List

Western Conifer Seed Bug in Wicomico Co., Maryland (11/9/2025). (c) connorkinch, some rights reserved (CC BY-NC)

View Record Details Photo by connorkinch via iNaturalist MBP List

Western Conifer Seed Bug in Montgomery Co., Maryland (11/12/2025). (c) emarten, some rights reserved (CC BY-NC)

View Record Details Photo by emarten via iNaturalist MBP List

Western Conifer Seed Bug in Howard Co., Maryland (8/17/2025). (c) Sue Muller, some rights reserved (CC BY-NC)

View Record Details Photo by Sue Muller MBP List

Western Conifer Seed Bug in Montgomery Co., Maryland (10/22/2021). (c) Dave, some rights reserved (CC BY-NC)

View Record Details Photo by drossme via iNaturalist MBP List

Western Conifer Seed Bug in Garrett Co., Maryland (3/20/2020). (c) Ashley Rodeheaver, all rights reserved (Photo ID: 1445986 - Psn: 200)

View Record Details Photo by Ashley Rodeheaver MBP List

Western Conifer Seed Bug in Garrett Co., Maryland (Date obscured). (c) Frode Jacobsen, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>) (Photo ID: 1489501 - Psn: 200)

Western Conifer Seed Bug in Garrett Co., Maryland (Date obscured). (c) Frode Jacobsen, some rights reserved (CC BY-NC)

View Record Details Photo by Frode Jacobsen MBP List

Map Snapshot

350 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

Status

A western U.S. species that has spread east across the continent since the 1950s. Interestingly, it was introduced to Europe in 1999 and is now common there.

Description

Compare Leaf-footed Pine Seed Bug. Dull reddish brown overall with alternating pattern of dark and white along rear of abdomen. Note shape of tibia dilation (about equal on outer and inner). Antennae roughly as long as the rest of its body.

Where To Find

Feeds on conifers during spring and summer. Often seeks shelter around buildings in late fall and winter.

Relationships

Relies on coniferous trees.

Seasonality Summary

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Resources

View at iNaturalist Search Google Images Search MBP Facebook posts

View images at BugGuide

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 Western Conifer Seed Bug in Worcester Co., Maryland (10/18/2013). View Record Details Media by Scott Housten.

Western Conifer Seed Bug in Montgomery Co., Maryland (10/15/2014). Media by Steve Scholnick.

A Western Conifer Seed Bug on Assateague Island, Maryland (11/9/2013). Media by Bill Hubick.

A Western Conifer Seed Bug in Carroll Co., Maryland (10/9/2020). View Record Details Media by Barbara Speckart.

A Western Conifer Seed Bug in Harford Co., Maryland (10/13/2015). View Record Details Media by Dave Webb.

Western Conifer Seed Bug in Worcester Co., Maryland (10/13/2013). View Record Details Media by Scott Housten.

A Western Conifer Seed Bug in Frederick Co., Maryland (6/11/2014). Media by Mark Etheridge.

A Western Conifer Seed Bug in Baltimore Co., Maryland (10/14/2015). Verified by Brandon Woo/BugGuide. View Record Details Media by Emily Stanley.

A Western Conifer Seed Bug in Cecil Co., Maryland (10/1/2013). Media by Bill Keim.

A Western Conifer Seed Bug in Prince George's Co., Maryland (10/18/2016). Verified by Ross Hill/BugGuide. View Record Details Media by Barbara Thurlow.

A Western Conifer Seed Bug in Harford Co., Maryland (10/19/2019). View Record Details Media by Dave Webb.

A Western Conifer Seed Bug in Worcester Co., Maryland (9/23/2013). Verified by Margarethe Brummermann/BugGuide. View Record Details Media by Scott Housten.

Western Conifer Seed Bug in Caroline Co., Maryland (11/6/2016). View Record Details Media by Wayne Longbottom.

Western Conifer Seed Bug in Garrett Co., Maryland (11/3/2022). (c) maryland adventure babe, some rights reserved (CC BY-NC). View Record Details Media by maryland_adventure_babe via iNaturalist.

A Western Conifer Seed Bug in Worcester Co., Maryland (10/12/2014). View Record Details Media by Scott Housten.

Western Conifer Seed Bug in Howard Co., Maryland (10/29/2019). (c) smuller, some rights reserved (CC BY-NC). View Record Details Media by Sue Muller.

A Western Conifer Seed Bug in Howard Co., Maryland (6/31/2014). Media by June Tveekrem.

A Western Conifer Seed Bug in St. Mary's Co., Maryland (11/6/2016). View Record Details Media by Tyler Bell.

Western Conifer Seed Bug in Baltimore City, Maryland (3/21/2020). View Record Details Media by Kirsten Johnson.

Western Conifer Seed Bug in Montgomery Co., Maryland (Date obscured). (c) Stella Tea, some rights reserved (CC BY-NC). View Record Details Media by Stella Tea (stazandgazer) via iNaturalist.

Western Conifer Seed Bug in Prince George's Co., Maryland (10/18/2025). (c) evagkatz, some rights reserved (CC BY-NC) View Record Details Media by evagkatz via iNaturalist.

Western Conifer Seed Bug in Wicomico Co., Maryland (11/9/2025). (c) connorkinch, some rights reserved (CC BY-NC) View Record Details Media by connorkinch via iNaturalist.

Western Conifer Seed Bug in Montgomery Co., Maryland (11/12/2025). (c) emarten, some rights reserved (CC BY-NC) View Record Details Media by emarten via iNaturalist.

Western Conifer Seed Bug in Howard Co., Maryland (8/17/2025). (c) Sue Muller, some rights reserved (CC BY-NC) View Record Details Media by Sue Muller.

Western Conifer Seed Bug in Montgomery Co., Maryland (10/22/2021). (c) Dave, some rights reserved (CC BY-NC) View Record Details Media by drossme via iNaturalist.

Western Conifer Seed Bug in Garrett Co., Maryland (Date obscured). (c) Frode Jacobsen, some rights reserved (CC BY-NC) View Record Details Media by Frode Jacobsen.