Hornbeam Leaf Gall Midge in Cecil Co., Maryland (5/16/2021).

View Record Details Photo by Dave Webb MBP List

<em>Dasineura pudibunda</em> in Anne Arundel Co., Maryland (10/13/2020). (c) Timothy Reichard, all rights reserved. (Photo ID: 316695 - Psn: 43)

View Record Details Photo by Timothy Reichard MBP List

<em>Dasineura pudibunda</em> in Anne Arundel Co., Maryland (10/13/2020). (c) Timothy Reichard, all rights reserved. (Photo ID: 316696 - Psn: 44)

View Record Details Photo by Timothy Reichard MBP List

<em>Dasineura pudibunda</em> in Anne Arundel Co., Maryland (10/13/2020). (c) Timothy Reichard, all rights reserved. (Photo ID: 316697 - Psn: 46)

View Record Details Photo by Timothy Reichard MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by/4.0/'>CC BY</a>). (Photo ID: 380498 - Psn: 55)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (CC BY).

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

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (CC BY).

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

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (CC BY).

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

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (CC BY).

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

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (CC BY).

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

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Deborah Barber, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 371253 - Psn: 66)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Deborah Barber, some rights reserved (CC BY-NC).

View Record Details Photo by Deborah Barber via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Harford Co., Maryland (10/11/2021).

View Record Details Photo by Dave Webb MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/1/2023). (c) Katja Schulz, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by/4.0/'>CC BY</a>). (Photo ID: 795481 - Psn: 144)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/1/2023). (c) Katja Schulz, some rights reserved (CC BY).

View Record Details Photo by Katja Schulz via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/5/2023). (c) martharosetta, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 796554 - Psn: 145)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/5/2023). (c) martharosetta, some rights reserved (CC BY-NC).

View Record Details Photo by martharosetta via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (6/13/2023). (c) Katja Schulz, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by/4.0/'>CC BY</a>). (Photo ID: 866308 - Psn: 145)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (6/13/2023). (c) Katja Schulz, some rights reserved (CC BY).

View Record Details Photo by Katja Schulz via iNaturalist MBP List

Hornbeam Leaf Gall Midge in St. Mary's Co., Maryland (5/5/2023). (c) jtylerbell, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1167468 - Psn: 145)

Hornbeam Leaf Gall Midge in St. Mary's Co., Maryland (5/5/2023). (c) jtylerbell, some rights reserved (CC BY-NC).

View Record Details Photo by Tyler Bell MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/1/2023). (c) Katja Schulz, some rights reserved (CC BY).

View Record Details Photo by Katja Schulz via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Prince George's Co., Maryland (4/27/2023). (c) Jenny Glenn, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 789206 - Psn: 162)

Hornbeam Leaf Gall Midge in Prince George's Co., Maryland (4/27/2023). (c) Jenny Glenn, some rights reserved (CC BY-NC).

View Record Details Photo by Jenny Glenn via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Baltimore City, Maryland (5/7/2023). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 797432 - Psn: 165)

Hornbeam Leaf Gall Midge in Baltimore City, Maryland (5/7/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Hornbeam Leaf Gall Midge in Anne Arundel Co., Maryland (5/4/2024). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1011641 - Psn: 165)

Hornbeam Leaf Gall Midge in Anne Arundel Co., Maryland (5/4/2024). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/12/2022). (c) David, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc-sa/4.0/'>CC BY-NC-SA</a>). (Photo ID: 571908 - Psn: 166)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/12/2022). (c) David, some rights reserved (CC BY-NC-SA).

View Record Details Photo by David via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/10/2022). (c) David, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc-sa/4.0/'>CC BY-NC-SA</a>). (Photo ID: 569556 - Psn: 170)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/10/2022). (c) David, some rights reserved (CC BY-NC-SA).

View Record Details Photo by David via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/18/2022). (c) David, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc-sa/4.0/'>CC BY-NC-SA</a>). (Photo ID: 572153 - Psn: 174)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/18/2022). (c) David, some rights reserved (CC BY-NC-SA).

View Record Details Photo by David via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/6/2023). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 796549 - Psn: 174)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/6/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Hornbeam Leaf Gall Midge in Prince George's Co., Maryland (4/27/2023). (c) Jenny Glenn, some rights reserved (CC BY-NC).

View Record Details Photo by Jenny Glenn via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Carrie Seltzer, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 533876 - Psn: 178)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Carrie Seltzer, some rights reserved (CC BY-NC).

View Record Details Photo by Carrie Seltzer via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Garrett Co., Maryland (Date obscured). (c) Josh Emm, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 892137 - Psn: 178)

Hornbeam Leaf Gall Midge in Garrett Co., Maryland (Date obscured). (c) Josh Emm, some rights reserved (CC BY-NC).

View Record Details Photo by Josh Emm MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Carrie Seltzer, some rights reserved (CC BY-NC).

View Record Details Photo by Carrie Seltzer via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Carrie Seltzer, some rights reserved (CC BY-NC).

View Record Details Photo by Carrie Seltzer via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2023). (c) Emily Summerbell, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by/4.0/'>CC BY</a>). (Photo ID: 797469 - Psn: 184)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2023). (c) Emily Summerbell, some rights reserved (CC BY).

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

Hornbeam Leaf Gall Midge in Calvert Co., Maryland (4/30/2023). (c) Deborah Barber, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 792294 - Psn: 185)

Hornbeam Leaf Gall Midge in Calvert Co., Maryland (4/30/2023). (c) Deborah Barber, some rights reserved (CC BY-NC).

View Record Details Photo by Deborah Barber via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2023). (c) Emily Summerbell, some rights reserved (CC BY).

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

Hornbeam Leaf Gall Midge in Anne Arundel Co., Maryland (4/27/2023). (c) Timothy Reichard, all rights reserved. (Photo ID: 798696 - Psn: 185)

View Record Details Photo by Timothy Reichard MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Carrie Seltzer, some rights reserved (CC BY-NC).

View Record Details Photo by Carrie Seltzer via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/18/2022). (c) David, some rights reserved (CC BY-NC-SA).

View Record Details Photo by David via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/27/2023). (c) epic2112, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 811295 - Psn: 188)

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/27/2023). (c) epic2112, some rights reserved (CC BY-NC).

View Record Details Photo by epic2112 via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Caroline Co., Maryland (5/30/2023). (c) Matthew Beziat, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1222425 - Psn: 188)

Hornbeam Leaf Gall Midge in Caroline Co., Maryland (5/30/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC).

View Record Details Photo by Matthew Beziat MBP List

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/12/2022). (c) David, some rights reserved (CC BY-NC-SA).

View Record Details Photo by David via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Prince George's Co., Maryland (4/27/2023). (c) Jenny Glenn, some rights reserved (CC BY-NC).

View Record Details Photo by Jenny Glenn via iNaturalist MBP List

Hornbeam Leaf Gall Midge in Harford Co., Maryland (5/22/2021).

View Record Details Photo by Dave Webb MBP List

Hornbeam Leaf Gall Midge in Anne Arundel Co., Maryland (4/27/2023). (c) Timothy Reichard, all rights reserved. (Photo ID: 798698 - Psn: 222)

View Record Details Photo by Timothy Reichard MBP List

Hornbeam Leaf Gall Midge in Queen Anne's Co., Maryland (5/24/2023). (c) Emilio Concari, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 811280 - Psn: 235)

Hornbeam Leaf Gall Midge in Queen Anne's Co., Maryland (5/24/2023). (c) Emilio Concari, some rights reserved (CC BY-NC).

View Record Details Photo by Emilio Concari MBP List

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

Hornbeam Leaf Gall Midge in Cecil Co., Maryland (5/16/2021). View Record Details Media by Dave Webb.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/17/2021). (c) Emily Summerbell, some rights reserved (CC BY). View Record Details Media by Emily Summerbell, Ph.D. via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Deborah Barber, some rights reserved (CC BY-NC). View Record Details Media by Deborah Barber via iNaturalist.

Hornbeam Leaf Gall Midge in Harford Co., Maryland (10/11/2021). View Record Details Media by Dave Webb.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/1/2023). (c) Katja Schulz, some rights reserved (CC BY). View Record Details Media by Katja Schulz via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/5/2023). (c) martharosetta, some rights reserved (CC BY-NC). View Record Details Media by martharosetta via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (6/13/2023). (c) Katja Schulz, some rights reserved (CC BY). View Record Details Media by Katja Schulz via iNaturalist.

Hornbeam Leaf Gall Midge in St. Mary's Co., Maryland (5/5/2023). (c) jtylerbell, some rights reserved (CC BY-NC). View Record Details Media by Tyler Bell.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/1/2023). (c) Katja Schulz, some rights reserved (CC BY). View Record Details Media by Katja Schulz via iNaturalist.

Hornbeam Leaf Gall Midge in Prince George's Co., Maryland (4/27/2023). (c) Jenny Glenn, some rights reserved (CC BY-NC). View Record Details Media by Jenny Glenn via iNaturalist.

Hornbeam Leaf Gall Midge in Baltimore City, Maryland (5/7/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Hornbeam Leaf Gall Midge in Anne Arundel Co., Maryland (5/4/2024). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/12/2022). (c) David, some rights reserved (CC BY-NC-SA). View Record Details Media by David via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/10/2022). (c) David, some rights reserved (CC BY-NC-SA). View Record Details Media by David via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/18/2022). (c) David, some rights reserved (CC BY-NC-SA). View Record Details Media by David via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/6/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Hornbeam Leaf Gall Midge in Prince George's Co., Maryland (4/27/2023). (c) Jenny Glenn, some rights reserved (CC BY-NC). View Record Details Media by Jenny Glenn via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Carrie Seltzer, some rights reserved (CC BY-NC). View Record Details Media by Carrie Seltzer via iNaturalist.

Hornbeam Leaf Gall Midge in Garrett Co., Maryland (Date obscured). (c) Josh Emm, some rights reserved (CC BY-NC). View Record Details Media by Josh Emm.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Carrie Seltzer, some rights reserved (CC BY-NC). View Record Details Media by Carrie Seltzer via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2023). (c) Emily Summerbell, some rights reserved (CC BY). View Record Details Media by Emily Summerbell, Ph.D. via iNaturalist.

Hornbeam Leaf Gall Midge in Calvert Co., Maryland (4/30/2023). (c) Deborah Barber, some rights reserved (CC BY-NC). View Record Details Media by Deborah Barber via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2023). (c) Emily Summerbell, some rights reserved (CC BY). View Record Details Media by Emily Summerbell, Ph.D. via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (4/30/2021). (c) Carrie Seltzer, some rights reserved (CC BY-NC). View Record Details Media by Carrie Seltzer via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/18/2022). (c) David, some rights reserved (CC BY-NC-SA). View Record Details Media by David via iNaturalist.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/27/2023). (c) epic2112, some rights reserved (CC BY-NC). View Record Details Media by epic2112 via iNaturalist.

Hornbeam Leaf Gall Midge in Caroline Co., Maryland (5/30/2023). (c) Matthew Beziat, some rights reserved (CC BY-NC). View Record Details Media by Matthew Beziat.

Hornbeam Leaf Gall Midge in Montgomery Co., Maryland (5/12/2022). (c) David, some rights reserved (CC BY-NC-SA). View Record Details Media by David via iNaturalist.

Hornbeam Leaf Gall Midge in Prince George's Co., Maryland (4/27/2023). (c) Jenny Glenn, some rights reserved (CC BY-NC). View Record Details Media by Jenny Glenn via iNaturalist.

Hornbeam Leaf Gall Midge in Harford Co., Maryland (5/22/2021). View Record Details Media by Dave Webb.

Hornbeam Leaf Gall Midge in Queen Anne's Co., Maryland (5/24/2023). (c) Emilio Concari, some rights reserved (CC BY-NC). View Record Details Media by Emilio Concari.