Oak Petiole Gall Wasp galls on Basket Oak in Dorchester Co., Maryland (5/23/2020). Identified by Timothy Frey.

View Record Details Photo by Jim Brighton MBP List

Oak Petiole Gall Wasp galls on Basket Oak in Dorchester Co., Maryland (5/23/2020). Identified by Timothy Frey.

View Record Details Photo by Jim Brighton MBP List

Oak Petiole Gall Wasp in Frederick Co., Maryland (6/18/2021). (c) Mark Etheridge, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 397967 - Psn: 44)

Oak Petiole Gall Wasp in Frederick Co., Maryland (6/18/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Charles Co., Maryland (5/5/2020). (c) Tim Emhoff, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 342004 - Psn: 45)

Oak Petiole Gall Wasp in Charles Co., Maryland (5/5/2020). (c) Tim Emhoff, some rights reserved (CC BY-NC).

View Record Details Photo by Tim Emhoff via iNaturalist MBP List

Oak Petiole Gall Wasp in Frederick Co., Maryland (6/18/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/12/2021). (c) reemms, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 377596 - Psn: 88)

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/12/2021). (c) reemms, some rights reserved (CC BY-NC).

View Record Details Photo by reemms via iNaturalist MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/2/2021). (c) Ken Rosenthal, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 373340 - Psn: 105)

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/2/2021). (c) Ken Rosenthal, some rights reserved (CC BY-NC).

View Record Details Photo by Ken Rosenthal via iNaturalist MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/2/2021). (c) Ken Rosenthal, some rights reserved (CC BY-NC).

View Record Details Photo by Ken Rosenthal via iNaturalist MBP List

Oak Petiole Gall Wasp in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 436993 - Psn: 110)

Oak Petiole Gall Wasp in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Frederick Co., Maryland (7/6/2021). (c) Mark Etheridge, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 421187 - Psn: 112)

Oak Petiole Gall Wasp in Frederick Co., Maryland (7/6/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Frederick Co., Maryland (7/6/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Dorchester Co., Maryland (5/28/2021). (c) Mark Etheridge, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 388036 - Psn: 114)

Oak Petiole Gall Wasp in Dorchester Co., Maryland (5/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Dorchester Co., Maryland (5/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Prince George's Co., Maryland (5/24/2020). (c) Jenny Glenn, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 294270 - Psn: 145)

Oak Petiole Gall Wasp in Prince George's Co., Maryland (5/24/2020). (c) Jenny Glenn, some rights reserved (CC BY-NC).

View Record Details Photo by Jenny Glenn via iNaturalist MBP List

Oak Petiole Gall Wasp in Prince George's Co., Maryland (4/27/2019). (c) Hans Holbrook, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 474583 - Psn: 145)

Oak Petiole Gall Wasp in Prince George's Co., Maryland (4/27/2019). (c) Hans Holbrook, some rights reserved (CC BY-NC).

View Record Details Photo by Hans Holbrook MBP List

Oak Petiole Gall Wasp in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Charles Co., Maryland (5/5/2020). (c) Tim Emhoff, some rights reserved (CC BY-NC).

View Record Details Photo by Tim Emhoff via iNaturalist MBP List

Oak Petiole Gall Wasp in Anne Arundel Co., Maryland (5/7/2021). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 713713 - Psn: 155)

Oak Petiole Gall Wasp in Anne Arundel Co., Maryland (5/7/2021). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/5/2023). (c) scoutingforplants, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 801941 - Psn: 155)

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/5/2023). (c) scoutingforplants, some rights reserved (CC BY-NC).

View Record Details Photo by scoutingforplants via iNaturalist MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (6/25/2023). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1195320 - Psn: 155)

Oak Petiole Gall Wasp in Montgomery Co., Maryland (6/25/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Oak Petiole Gall Wasp in Baltimore Co., Maryland (5/31/2021). (c) Jim Brighton, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 388444 - Psn: 165)

Oak Petiole Gall Wasp in Baltimore Co., Maryland (5/31/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).

View Record Details Photo by Jim Brighton MBP List

Oak Petiole Gall Wasp in Allegany Co., Maryland (5/28/2023). (c) Mark Etheridge, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 810497 - Psn: 165)

Oak Petiole Gall Wasp in Allegany Co., Maryland (5/28/2023). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Baltimore Co., Maryland (5/31/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).

View Record Details Photo by Jim Brighton MBP List

Oak Petiole Gall Wasp in Baltimore Co., Maryland (5/31/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).

View Record Details Photo by Jim Brighton MBP List

Oak Petiole Gall Wasp in Frederick Co., Maryland (8/28/2021). (c) Mark Etheridge, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 692457 - Psn: 175)

Oak Petiole Gall Wasp in Frederick Co., Maryland (8/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC).

View Record Details Photo by Mark Etheridge MBP List

Oak Petiole Gall Wasp in Baltimore Co., Maryland (5/1/2023). (c) eouslander, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 792197 - Psn: 175)

Oak Petiole Gall Wasp in Baltimore Co., Maryland (5/1/2023). (c) eouslander, some rights reserved (CC BY-NC).

View Record Details Photo by eouslander via iNaturalist MBP List

Oak Petiole Gall Wasp in Queen Anne's Co., Maryland (5/25/2021). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1127317 - Psn: 175)

Oak Petiole Gall Wasp in Queen Anne's Co., Maryland (5/25/2021). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Oak Petiole Gall Wasp in Anne Arundel Co., Maryland (4/27/2025). (c) Joe Girgente, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1249328 - Psn: 175)

Oak Petiole Gall Wasp in Anne Arundel Co., Maryland (4/27/2025). (c) Joe Girgente, some rights reserved (CC BY-NC).

View Record Details Photo by Joe Girgente via iNaturalist MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (6/25/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (6/3/2023). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 851283 - Psn: 182)

Oak Petiole Gall Wasp in Montgomery Co., Maryland (6/3/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/7/2022). (c) Emily Summerbell, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by/4.0/'>CC BY</a>). (Photo ID: 565208 - Psn: 185)

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/7/2022). (c) Emily Summerbell, some rights reserved (CC BY).

View Record Details Photo by Emily Summerbell, Ph.D. via iNaturalist MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (9/16/2023). (c) Emily Summerbell, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by/4.0/'>CC BY</a>). (Photo ID: 892363 - Psn: 185)

Oak Petiole Gall Wasp in Montgomery Co., Maryland (9/16/2023). (c) Emily Summerbell, some rights reserved (CC BY).

View Record Details Photo by Emily Summerbell, Ph.D. via iNaturalist MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/7/2022). (c) Emily Summerbell, some rights reserved (CC BY).

View Record Details Photo by Emily Summerbell, Ph.D. via iNaturalist MBP List

Oak Petiole Gall Wasp in Anne Arundel Co., Maryland (5/23/2022). (c) Timothy Reichard, all rights reserved. (Photo ID: 812367 - Psn: 186)

View Record Details Photo by Timothy Reichard MBP List

Oak Petiole Gall Wasp in Prince George's Co., Maryland (5/25/2022). (c) epic2112, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 576221 - Psn: 188)

Oak Petiole Gall Wasp in Prince George's Co., Maryland (5/25/2022). (c) epic2112, some rights reserved (CC BY-NC).

View Record Details Photo by epic2112 via iNaturalist MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/5/2023). (c) scoutingforplants, some rights reserved (CC BY-NC).

View Record Details Photo by scoutingforplants via iNaturalist MBP List

Oak Petiole Gall Wasp in Anne Arundel Co., Maryland (5/23/2022). (c) Timothy Reichard, all rights reserved. (Photo ID: 812369 - Psn: 188)

View Record Details Photo by Timothy Reichard MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (7/22/2023). (c) Emily Summerbell, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by/4.0/'>CC BY</a>). (Photo ID: 854932 - Psn: 188)

Oak Petiole Gall Wasp in Montgomery Co., Maryland (7/22/2023). (c) Emily Summerbell, some rights reserved (CC BY).

View Record Details Photo by Emily Summerbell, Ph.D. via iNaturalist MBP List

Oak Petiole Gall Wasp in Calvert Co., Maryland (10/8/2023). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 899153 - Psn: 188)

Oak Petiole Gall Wasp in Calvert Co., Maryland (10/8/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Oak Petiole Gall Wasp in Prince George's Co., Maryland (5/11/2024). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1195322 - Psn: 188)

Oak Petiole Gall Wasp in Prince George's Co., Maryland (5/11/2024). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Oak Petiole Gall Wasp in Anne Arundel Co., Maryland (4/27/2025). (c) Joe Girgente, some rights reserved (CC BY-NC).

View Record Details Photo by Joe Girgente via iNaturalist MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/7/2022). (c) Emily Summerbell, some rights reserved (CC BY).

View Record Details Photo by Emily Summerbell, Ph.D. via iNaturalist MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/7/2022). (c) Emily Summerbell, some rights reserved (CC BY).

View Record Details Photo by Emily Summerbell, Ph.D. via iNaturalist MBP List

Oak Petiole Gall Wasp in Dorchester Co., Maryland (5/22/2021). (c) Jim Brighton, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 387273 - Psn: 200)

Oak Petiole Gall Wasp in Dorchester Co., Maryland (5/22/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).

View Record Details Photo by Jim Brighton MBP List

Oak Petiole Gall Wasp in Dorchester Co., Maryland (5/22/2021). (c) Jim Brighton, some rights reserved (CC BY-NC).

View Record Details Photo by Jim Brighton MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (7/22/2023). (c) Emily Summerbell, some rights reserved (CC BY).

View Record Details Photo by Emily Summerbell, Ph.D. via iNaturalist MBP List

Oak Petiole Gall Wasp in Montgomery Co., Maryland (7/22/2023). (c) Emily Summerbell, some rights reserved (CC BY).

View Record Details Photo by Emily Summerbell, Ph.D. via iNaturalist MBP List

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

Oak Petiole Gall Wasp galls on Basket Oak in Dorchester Co., Maryland (5/23/2020). Identified by Timothy Frey. View Record Details Media by Jim Brighton.

Oak Petiole Gall Wasp in Frederick Co., Maryland (6/18/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Charles Co., Maryland (5/5/2020). (c) Tim Emhoff, some rights reserved (CC BY-NC). View Record Details Media by Tim Emhoff via iNaturalist.

Oak Petiole Gall Wasp in Frederick Co., Maryland (6/18/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/12/2021). (c) reemms, some rights reserved (CC BY-NC). View Record Details Media by reemms via iNaturalist.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/2/2021). (c) Ken Rosenthal, some rights reserved (CC BY-NC). View Record Details Media by Ken Rosenthal via iNaturalist.

Oak Petiole Gall Wasp in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Frederick Co., Maryland (7/6/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Frederick Co., Maryland (7/6/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Dorchester Co., Maryland (5/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Prince George's Co., Maryland (5/24/2020). (c) Jenny Glenn, some rights reserved (CC BY-NC). View Record Details Media by Jenny Glenn via iNaturalist.

Oak Petiole Gall Wasp in Prince George's Co., Maryland (4/27/2019). (c) Hans Holbrook, some rights reserved (CC BY-NC). View Record Details Media by Hans Holbrook.

Oak Petiole Gall Wasp in Dorchester Co., Maryland (8/19/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Charles Co., Maryland (5/5/2020). (c) Tim Emhoff, some rights reserved (CC BY-NC). View Record Details Media by Tim Emhoff via iNaturalist.

Oak Petiole Gall Wasp in Anne Arundel Co., Maryland (5/7/2021). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/5/2023). (c) scoutingforplants, some rights reserved (CC BY-NC). View Record Details Media by scoutingforplants via iNaturalist.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (6/25/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Oak Petiole Gall Wasp in Baltimore Co., Maryland (5/31/2021). (c) Jim Brighton, some rights reserved (CC BY-NC). View Record Details Media by Jim Brighton.

Oak Petiole Gall Wasp in Allegany Co., Maryland (5/28/2023). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Baltimore Co., Maryland (5/31/2021). (c) Jim Brighton, some rights reserved (CC BY-NC). View Record Details Media by Jim Brighton.

Oak Petiole Gall Wasp in Frederick Co., Maryland (8/28/2021). (c) Mark Etheridge, some rights reserved (CC BY-NC). View Record Details Media by Mark Etheridge.

Oak Petiole Gall Wasp in Baltimore Co., Maryland (5/1/2023). (c) eouslander, some rights reserved (CC BY-NC). View Record Details Media by eouslander via iNaturalist.

Oak Petiole Gall Wasp in Queen Anne's Co., Maryland (5/25/2021). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Oak Petiole Gall Wasp in Anne Arundel Co., Maryland (4/27/2025). (c) Joe Girgente, some rights reserved (CC BY-NC). View Record Details Media by Joe Girgente via iNaturalist.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (6/25/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (6/3/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/7/2022). (c) Emily Summerbell, some rights reserved (CC BY). View Record Details Media by Emily Summerbell, Ph.D. via iNaturalist.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (9/16/2023). (c) Emily Summerbell, some rights reserved (CC BY). View Record Details Media by Emily Summerbell, Ph.D. via iNaturalist.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/7/2022). (c) Emily Summerbell, some rights reserved (CC BY). View Record Details Media by Emily Summerbell, Ph.D. via iNaturalist.

Oak Petiole Gall Wasp in Prince George's Co., Maryland (5/25/2022). (c) epic2112, some rights reserved (CC BY-NC). View Record Details Media by epic2112 via iNaturalist.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/5/2023). (c) scoutingforplants, some rights reserved (CC BY-NC). View Record Details Media by scoutingforplants via iNaturalist.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (7/22/2023). (c) Emily Summerbell, some rights reserved (CC BY). View Record Details Media by Emily Summerbell, Ph.D. via iNaturalist.

Oak Petiole Gall Wasp in Calvert Co., Maryland (10/8/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Oak Petiole Gall Wasp in Prince George's Co., Maryland (5/11/2024). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Oak Petiole Gall Wasp in Anne Arundel Co., Maryland (4/27/2025). (c) Joe Girgente, some rights reserved (CC BY-NC). View Record Details Media by Joe Girgente via iNaturalist.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (5/7/2022). (c) Emily Summerbell, some rights reserved (CC BY). View Record Details Media by Emily Summerbell, Ph.D. via iNaturalist.

Oak Petiole Gall Wasp in Dorchester Co., Maryland (5/22/2021). (c) Jim Brighton, some rights reserved (CC BY-NC). View Record Details Media by Jim Brighton.

Oak Petiole Gall Wasp in Montgomery Co., Maryland (7/22/2023). (c) Emily Summerbell, some rights reserved (CC BY). View Record Details Media by Emily Summerbell, Ph.D. via iNaturalist.