Eastern Hercules Beetles in Baltimore Co., Maryland (8/1/2020). (c) Pat Treece, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 400245 - Psn: 6)

Eastern Hercules Beetles in Baltimore Co., Maryland (8/1/2020). (c) Pat Treece, some rights reserved (CC BY-NC).

View Record Details Photo by ptreece via iNaturalist MBP List

A male Eastern Hercules Beetle in Montgomery Co., Maryland (6/28/2022).

View Record Details Photo by Jim Moore MBP List

A male Eastern Hercules Beetle in Talbot Co., Maryland (6/24/2009).

Photo by Jim Brighton MBP List

A male Eastern Hercules Beetle in Harford Co., Maryland (7/23/2017).

View Record Details Photo by Josh Emm MBP List

Eastern Hercules Beetle in Frederick Co., Maryland (7/15/2021). (c) Emilio Concari, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 417066 - Psn: 10)

Eastern Hercules Beetle in Frederick Co., Maryland (7/15/2021). (c) Emilio Concari, some rights reserved (CC BY-NC).

View Record Details Photo by Emilio Concari MBP List

A male Eastern Hercules Beetle in Cambridge, Maryland (7/1/2013).

Photo by Scott Housten MBP List

An Eastern Hercules Beetle in St. Mary's Co., Maryland (6/23/2017).

View Record Details Photo by Jane Kostenko MBP List

An Eastern Hercules Beetle in Howard Co., Maryland (8/28/2016).

View Record Details Photo by Anthony VanSchoor MBP List

An Eastern Hercules Beetle in Harford Co., Maryland (8/16/2018).

View Record Details Photo by Dave Webb MBP List

An Eastern Hercules Beetle in Harford Co., Maryland (8/16/2017).

View Record Details Photo by Richard Crook MBP List

A male Eastern Hercules Beetle in Cecil Co., Maryland (7/6/2012).

Photo by Sean McCandless MBP List

Eastern Hercules Beetle in Wicomico Co., Maryland (9/8/2017). (c) sanctalucia, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by/4.0/'>CC BY</a>). (Photo ID: 189078 - Psn: 36)

Eastern Hercules Beetle in Wicomico Co., Maryland (9/8/2017). (c) sanctalucia, some rights reserved (CC BY).

View Record Details Photo by sanctalucia via iNaturalist MBP List

A male Eastern Hercules Beetle in Dorchester Co., Maryland (7/1/2013).

Photo by Scott Housten MBP List

Eastern Hercules Beetle in Howard Co., Maryland (7/15/2017). (c) Timothy Reichard, all rights reserved. (Photo ID: 200494 - Psn: 42)

View Record Details Photo by Timothy Reichard MBP List

An Eastern Hercules Beetle in Prince George's Co., Maryland (7/2/2021).

View Record Details Photo by Barbara Thurlow MBP List

Eastern Hercules Beetle in St. Mary's Co., Maryland (7/9/2021). (c) Benji Beluga, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 413533 - Psn: 42)

Eastern Hercules Beetle in St. Mary's Co., Maryland (7/9/2021). (c) Benji Beluga, some rights reserved (CC BY-NC).

View Record Details Photo by Ben Springer MBP List

An Eastern Hercules Beetle in Howard Co., Maryland (7/15/2017).

View Record Details Photo by Sue Muller MBP List

A female Eastern Hercules Beetle in Harford Co., Maryland (7/18/2019).

View Record Details Photo by Dave Webb MBP List

Eastern Hercules Beetle in Montgomery Co., Maryland (7/6/2021). (c) amyt1970, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 409110 - Psn: 45)

Eastern Hercules Beetle in Montgomery Co., Maryland (7/6/2021). (c) amyt1970, some rights reserved (CC BY-NC).

View Record Details Photo by amyt1970 via iNaturalist MBP List

Eastern Hercules Beetle in Montgomery Co., Maryland (7/11/2021). (c) bigpicture2, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 410796 - Psn: 45)

Eastern Hercules Beetle in Montgomery Co., Maryland (7/11/2021). (c) bigpicture2, some rights reserved (CC BY-NC).

View Record Details Photo by bigpicture2 via iNaturalist MBP List

A male Eastern Hercules Beetle in Anne Arundel Co., Maryland (8/9/2019).

View Record Details Photo by Robert Aguilar, SERC MBP List

A male Eastern Hercules Beetle specimen collected at Dundee Creek Marina, Baltimore Co., Maryland (summer 1999).

Photo by Mike Lathroum MBP List

Eastern Hercules Beetle in Anne Arundel Co., Maryland (6/15/2022). (c) trinectes, all rights reserved. (Photo ID: 588288 - Psn: 50)

View Record Details Photo by Robert Aguilar, SERC MBP List

An Eastern Hercules Beetle in Howard Co., Maryland (6/16/2018).

View Record Details Photo by Kurt Schwarz MBP List

Eastern Hercules Beetle in Howard Co., Maryland (7/23/2016). (c) Timothy Reichard, all rights reserved. (Photo ID: 193882 - Psn: 52)

View Record Details Photo by Timothy Reichard MBP List

Eastern Hercules Beetle in Frederick Co., Maryland (7/15/2021). (c) Emilio Concari, some rights reserved (CC BY-NC).

View Record Details Photo by Emilio Concari MBP List

An Eastern Hercules Beetle in Caroline Co., Maryland (7/14/2020).

View Record Details Photo by Dave Webb MBP List

A female Eastern Hercules Beetle in Kent Co., Maryland (7/14/2015).

View Record Details Photo by Barbara Ellis MBP List

A female Eastern Hercules Beetle in Calvert Co., Maryland (7/11/2016).

View Record Details Photo by Tyler Bell MBP List

Eastern Hercules Beetle in St. Mary's Co., Maryland (8/22/2021). (c) jtylerbell, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 436568 - Psn: 76)

Eastern Hercules Beetle in St. Mary's Co., Maryland (8/22/2021). (c) jtylerbell, some rights reserved (CC BY-NC).

View Record Details Photo by Tyler Bell MBP List

A female Eastern Hercules Beetle in Maryland.

View Record Details Photo by USGS PWRC MBP List

A female Eastern Hercules Beetle in Maryland.

View Record Details Photo by USGS PWRC MBP List

Eastern Hercules Beetle in St. Mary's Co., Maryland (6/26/2020). (c) jtylerbell, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 177700 - Psn: 82)

Eastern Hercules Beetle in St. Mary's Co., Maryland (6/26/2020). (c) jtylerbell, some rights reserved (CC BY-NC).

View Record Details Photo by Tyler Bell MBP List

A female Eastern Hercules Beetle in Maryland.

View Record Details Photo by USGS PWRC MBP List

Eastern Hercules Beetle in Dorchester Co., Maryland (6/28/2017). (c) Jesse Fleri, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 179337 - Psn: 87)

Eastern Hercules Beetle in Dorchester Co., Maryland (6/28/2017). (c) Jesse Fleri, some rights reserved (CC BY-NC).

View Record Details Photo by Jesse Fleri via iNaturalist MBP List

Eastern Hercules Beetle in Dorchester Co., Maryland (6/28/2017). (c) Jesse Fleri, some rights reserved (CC BY-NC).

View Record Details Photo by Jesse Fleri via iNaturalist MBP List

Eastern Hercules Beetle in Anne Arundel Co., Maryland (7/4/2018).

View Record Details Photo by Coreen Weilminster MBP List

A female Eastern Hercules Beetle in Anne Arundel Co., Maryland (8/13/2019).

View Record Details Photo by Lynn Strauss MBP List

An Eastern Hercules Beetle larvae in Howard Co., Maryland (4/23/2013).

Photo by Bonnie Ott MBP List

Eastern Hercules Beetle in St. Mary's Co., Maryland (7/19/2023). (c) jtylerbell, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 850183 - Psn: 200)

Eastern Hercules Beetle in St. Mary's Co., Maryland (7/19/2023). (c) jtylerbell, some rights reserved (CC BY-NC).

View Record Details Photo by Tyler Bell MBP List

Eastern Hercules Beetle in St. Mary's Co., Maryland (7/18/2025). (c) jtylerbell, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1306599 - Psn: 200)

Eastern Hercules Beetle in St. Mary's Co., Maryland (7/18/2025). (c) jtylerbell, some rights reserved (CC BY-NC).

View Record Details Photo by Tyler Bell MBP List

Eastern Hercules Beetle in Montgomery Co., Maryland (8/9/2021). (c) katherinemljones, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1325173 - Psn: 200)

Eastern Hercules Beetle in Montgomery Co., Maryland (8/9/2021). (c) katherinemljones, some rights reserved (CC BY-NC).

View Record Details Photo by katherinemljones via iNaturalist MBP List

Eastern Hercules Beetle in Queen Anne's Co., Maryland (8/7/2025). (c) Adrienne van den Beemt, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by/4.0/'>CC BY</a>). (Photo ID: 1325257 - Psn: 200)

Eastern Hercules Beetle in Queen Anne's Co., Maryland (8/7/2025). (c) Adrienne van den Beemt, some rights reserved (CC BY).

View Record Details Photo by Adrienne van den Beemt MBP List

The elytrum of an Eastern Hercules Beetle found in Anne Arundel Co., Maryland (9/21/2014).

Photo by Matt Grey MBP List

Eastern Hercules Beetles in Baltimore Co., Maryland (Date obscured). (c) Rin Wolfe, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 400432 - Psn: 255)

Eastern Hercules Beetles in Baltimore Co., Maryland (Date obscured). (c) Rin Wolfe, some rights reserved (CC BY-NC).

View Record Details Photo by rinwolfe via iNaturalist MBP List

Map Snapshot

496 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

MBP has records of adults from June 23 through September 21.

Description

Eastern Hercules Beetles are the heaviest of all North American beetles (BugGuide). The green coloration with black spots is distinctive. Males have two horns that are used to battle other males during mating season.

Where To Find

Often come into lights.

Relationships

Larvae are raised in the heartwood of hardwoods.

Seasonality Summary

No filters. Click here to explore and apply filters.

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.

Eastern Hercules Beetles in Baltimore Co., Maryland (8/1/2020). (c) Pat Treece, some rights reserved (CC BY-NC). View Record Details Media by ptreece via iNaturalist.

A male Eastern Hercules Beetle in Montgomery Co., Maryland (6/28/2022). View Record Details Media by Jim Moore.

A male Eastern Hercules Beetle in Talbot Co., Maryland (6/24/2009). Media by Jim Brighton.

A male Eastern Hercules Beetle in Harford Co., Maryland (7/23/2017). View Record Details Media by Josh Emm.

Eastern Hercules Beetle in Frederick Co., Maryland (7/15/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). View Record Details Media by Emilio Concari.

A male Eastern Hercules Beetle in Cambridge, Maryland (7/1/2013). Media by Scott Housten.

An Eastern Hercules Beetle in St. Mary's Co., Maryland (6/23/2017). View Record Details Media by Jane Kostenko.

An Eastern Hercules Beetle in Howard Co., Maryland (8/28/2016). View Record Details Media by Anthony VanSchoor.

An Eastern Hercules Beetle in Harford Co., Maryland (8/16/2018). View Record Details Media by Dave Webb.

An Eastern Hercules Beetle in Harford Co., Maryland (8/16/2017). View Record Details Media by Richard Crook.

A male Eastern Hercules Beetle in Cecil Co., Maryland (7/6/2012). Media by Sean McCandless.

Eastern Hercules Beetle in Wicomico Co., Maryland (9/8/2017). (c) sanctalucia, some rights reserved (CC BY). View Record Details Media by sanctalucia via iNaturalist.

A male Eastern Hercules Beetle in Dorchester Co., Maryland (7/1/2013). Media by Scott Housten.

An Eastern Hercules Beetle in Prince George's Co., Maryland (7/2/2021). View Record Details Media by Barbara Thurlow.

Eastern Hercules Beetle in St. Mary's Co., Maryland (7/9/2021). (c) Benji Beluga, some rights reserved (CC BY-NC). View Record Details Media by Ben Springer.

An Eastern Hercules Beetle in Howard Co., Maryland (7/15/2017). View Record Details Media by Sue Muller.

A female Eastern Hercules Beetle in Harford Co., Maryland (7/18/2019). View Record Details Media by Dave Webb.

Eastern Hercules Beetle in Montgomery Co., Maryland (7/6/2021). (c) amyt1970, some rights reserved (CC BY-NC). View Record Details Media by amyt1970 via iNaturalist.

Eastern Hercules Beetle in Montgomery Co., Maryland (7/11/2021). (c) bigpicture2, some rights reserved (CC BY-NC). View Record Details Media by bigpicture2 via iNaturalist.

A male Eastern Hercules Beetle in Anne Arundel Co., Maryland (8/9/2019). View Record Details Media by Robert Aguilar, SERC.

A male Eastern Hercules Beetle specimen collected at Dundee Creek Marina, Baltimore Co., Maryland (summer 1999). Media by Mike Lathroum.

An Eastern Hercules Beetle in Howard Co., Maryland (6/16/2018). View Record Details Media by Kurt Schwarz.

Eastern Hercules Beetle in Frederick Co., Maryland (7/15/2021). (c) Emilio Concari, some rights reserved (CC BY-NC). View Record Details Media by Emilio Concari.

An Eastern Hercules Beetle in Caroline Co., Maryland (7/14/2020). View Record Details Media by Dave Webb.

A female Eastern Hercules Beetle in Kent Co., Maryland (7/14/2015). View Record Details Media by Barbara Ellis.

A female Eastern Hercules Beetle in Calvert Co., Maryland (7/11/2016). View Record Details Media by Tyler Bell.

Eastern Hercules Beetle in St. Mary's Co., Maryland (8/22/2021). (c) jtylerbell, some rights reserved (CC BY-NC). View Record Details Media by Tyler Bell.

A female Eastern Hercules Beetle in Maryland. View Record Details Media by USGS PWRC.

Eastern Hercules Beetle in St. Mary's Co., Maryland (6/26/2020). (c) jtylerbell, some rights reserved (CC BY-NC). View Record Details Media by Tyler Bell.

A female Eastern Hercules Beetle in Maryland. View Record Details Media by USGS PWRC.

Eastern Hercules Beetle in Dorchester Co., Maryland (6/28/2017). (c) Jesse Fleri, some rights reserved (CC BY-NC). View Record Details Media by Jesse Fleri via iNaturalist.

Eastern Hercules Beetle in Anne Arundel Co., Maryland (7/4/2018). View Record Details Media by Coreen Weilminster.

A female Eastern Hercules Beetle in Anne Arundel Co., Maryland (8/13/2019). View Record Details Media by Lynn Strauss.

An Eastern Hercules Beetle larvae in Howard Co., Maryland (4/23/2013). Media by Bonnie Ott.

Eastern Hercules Beetle in St. Mary's Co., Maryland (7/19/2023). (c) jtylerbell, some rights reserved (CC BY-NC). View Record Details Media by Tyler Bell.

Eastern Hercules Beetle in St. Mary's Co., Maryland (7/18/2025). (c) jtylerbell, some rights reserved (CC BY-NC). View Record Details Media by Tyler Bell.

Eastern Hercules Beetle in Montgomery Co., Maryland (8/9/2021). (c) katherinemljones, some rights reserved (CC BY-NC). View Record Details Media by katherinemljones via iNaturalist.

Eastern Hercules Beetle in Queen Anne's Co., Maryland (8/7/2025). (c) Adrienne van den Beemt, some rights reserved (CC BY). View Record Details Media by Adrienne van den Beemt.

The elytrum of an Eastern Hercules Beetle found in Anne Arundel Co., Maryland (9/21/2014). Media by Matt Grey.

Eastern Hercules Beetles in Baltimore Co., Maryland (Date obscured). (c) Rin Wolfe, some rights reserved (CC BY-NC). View Record Details Media by rinwolfe via iNaturalist.