A Sand Hammertail in Cecil Co., Maryland (7/16/2014).

View Record Details Photo by Mark Johnson MBP List

A female Sand Hammertail in Cecil Co., Maryland (7/16/2014).

View Record Details Photo by Mark Johnson MBP List

A female Sand Hammertail in St. Mary's Co., Maryland (6/1/2015).

View Record Details Photo by Steve Scholnick MBP List

A male Sand Hammertail in St. Mary's Co., Maryland (6/1/2015).

View Record Details Photo by Steve Scholnick MBP List

A male Sand Hammertail in St. Mary's Co., Maryland (6/1/2015).

View Record Details Photo by Steve Scholnick MBP List

A female Sand Hammertail in Caroline Co., Maryland (5/27/2007).

Photo by Steve Collins MBP List

A Sand Hammertail in Worcester Co., Maryland (6/9/2022). (c) danieltayloroc, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 584484 - Psn: 20)

A Sand Hammertail in Worcester Co., Maryland (6/9/2022). (c) danieltayloroc, some rights reserved (CC BY-NC).

View Record Details Photo by danieltayloroc via iNaturalist MBP List

A Sand Hammertail in Anne Arundel Co., Maryland (7/20/2018).

View Record Details Photo by Judy Gallagher MBP List

A Sand Hammertail in Worcester Co., Maryland (7/29/2006).

View Record Details Photo by Jim Brighton MBP List

A Sand Hammertail in Talbot Co., Maryland (7/16/2021). (c) pcowartrickmanphoto, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 415627 - Psn: 35)

A Sand Hammertail in Talbot Co., Maryland (7/16/2021). (c) pcowartrickmanphoto, some rights reserved (CC BY-NC).

View Record Details Photo by Pamela Cowart-Rickman MBP List

A male Sand Hammertail in Caroline Co., Maryland (6/13/2020). Verified by Bob Biagi/BugGuide.

View Record Details Photo by Jim Moore MBP List

Sand Hammertail in Queen Anne's Co., Maryland (6/7/2024). (c) pcowartrickmanphoto, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1037255 - Psn: 44)

Sand Hammertail in Queen Anne's Co., Maryland (6/7/2024). (c) pcowartrickmanphoto, some rights reserved (CC BY-NC).

View Record Details Photo by Pamela Cowart-Rickman MBP List

A Sand Hammertail in Prince George's Co., Maryland (7/7/2018). (c) Frode Jacobsen, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 752766 - Psn: 55)

A Sand Hammertail in Prince George's Co., Maryland (7/7/2018). (c) Frode Jacobsen, some rights reserved (CC BY-NC).

View Record Details Photo by Frode Jacobsen MBP List

A Sand Hammertail in Queen Anne's Co., Maryland (6/13/2021). (c) pcowartrickmanphoto, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 397087 - Psn: 66)

A Sand Hammertail in Queen Anne's Co., Maryland (6/13/2021). (c) pcowartrickmanphoto, some rights reserved (CC BY-NC).

View Record Details Photo by Pamela Cowart-Rickman MBP List

A Sand Hammertail in Worcester Co., Maryland (Date obscured). (c) Jim Brighton, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 853133 - Psn: 66)

A Sand Hammertail in Worcester Co., Maryland (Date obscured). (c) Jim Brighton, some rights reserved (CC BY-NC).

View Record Details Photo by Jim Brighton MBP List

Sand Hammertail in St. Mary's Co., Maryland (7/2/2023). (c) Pablo Tapia Ossa, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1070772 - Psn: 75)

Sand Hammertail in St. Mary's Co., Maryland (7/2/2023). (c) Pablo Tapia Ossa, some rights reserved (CC BY-NC).

View Record Details Photo by volteka via iNaturalist MBP List

A Sand Hammertail in Kent Co., Maryland (7/3/2020). (c) pcowartrickmanphoto, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 181362 - Psn: 76)

A Sand Hammertail in Kent Co., Maryland (7/3/2020). (c) pcowartrickmanphoto, some rights reserved (CC BY-NC).

View Record Details Photo by Pamela Cowart-Rickman MBP List

Sand Hammertail in St. Mary's Co., Maryland (7/2/2023). (c) Pablo Tapia Ossa, some rights reserved (CC BY-NC).

View Record Details Photo by volteka via iNaturalist MBP List

Sand Hammertail in Calvert Co., Maryland (7/2/2025). (c) jugbayjs, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 1295070 - Psn: 77)

Sand Hammertail in Calvert Co., Maryland (7/2/2025). (c) jugbayjs, some rights reserved (CC BY-NC).

View Record Details Photo by jugbayjs via iNaturalist MBP List

A Sand Hammertail in Caroline Co., Maryland (5/26/2019). (c) Elizabeth Green, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc-nd/4.0/'>CC BY-NC-ND</a>). (Photo ID: 279961 - Psn: 78)

A Sand Hammertail in Caroline Co., Maryland (5/26/2019). (c) Elizabeth Green, some rights reserved (CC BY-NC-ND).

View Record Details Photo by Elizabeth Green via iNaturalist MBP List

Sand Hammertail in Caroline Co., Maryland (Date obscured). (c) Kyle Klotz, all rights reserved. (Photo ID: 1057648 - Psn: 78)

View Record Details Photo by Kyle Klotz MBP List

A Sand Hammertail in Caroline Co., Maryland (6/21/2020). (c) Aaron, some rights reserved (<a rel='license' href='http://creativecommons.org/licenses/by-nc/4.0/'>CC BY-NC</a>). (Photo ID: 201622 - Psn: 88)

A Sand Hammertail in Caroline Co., Maryland (6/21/2020). (c) Aaron, some rights reserved (CC BY-NC).

View Record Details Photo by Aaron via iNaturalist MBP List

A male Sand Hammertail in Anne Arundel Co., Maryland (7/26/2015). Verified by Herschel Raney/BugGuide.

View Record Details Photo by Bill Hubick MBP List

Map Snapshot

79 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 robber fly of open, sandy habitats near water, Efferia albibarbis is most likely to be found near the shore, or large rivers. The species has a very wide range across much of North America (Baker & Fischer, 1975). The genus Efferia s.l. is quite speciose, and some dipterists split it up into a number of smaller genera. Following that classification, this species would be placed in Albibarbefferia.

Description

Note white moustache (mystax). Female ovipositor shape helps eliminate other Efferia.

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 Sand Hammertail in Cecil Co., Maryland (7/16/2014). View Record Details Media by Mark Johnson.

A female Sand Hammertail in Cecil Co., Maryland (7/16/2014). View Record Details Media by Mark Johnson.

A female Sand Hammertail in St. Mary's Co., Maryland (6/1/2015). View Record Details Media by Steve Scholnick.

A male Sand Hammertail in St. Mary's Co., Maryland (6/1/2015). View Record Details Media by Steve Scholnick.

A female Sand Hammertail in Caroline Co., Maryland (5/27/2007). Media by Steve Collins.

A Sand Hammertail in Worcester Co., Maryland (6/9/2022). (c) danieltayloroc, some rights reserved (CC BY-NC). View Record Details Media by danieltayloroc via iNaturalist.

A Sand Hammertail in Anne Arundel Co., Maryland (7/20/2018). View Record Details Media by Judy Gallagher.

A Sand Hammertail in Worcester Co., Maryland (7/29/2006). View Record Details Media by Jim Brighton.

A Sand Hammertail in Talbot Co., Maryland (7/16/2021). (c) pcowartrickmanphoto, some rights reserved (CC BY-NC). View Record Details Media by Pamela Cowart-Rickman.

A male Sand Hammertail in Caroline Co., Maryland (6/13/2020). Verified by Bob Biagi/BugGuide. View Record Details Media by Jim Moore.

Sand Hammertail in Queen Anne's Co., Maryland (6/7/2024). (c) pcowartrickmanphoto, some rights reserved (CC BY-NC). View Record Details Media by Pamela Cowart-Rickman.

A Sand Hammertail in Prince George's Co., Maryland (7/7/2018). (c) Frode Jacobsen, some rights reserved (CC BY-NC). View Record Details Media by Frode Jacobsen.

A Sand Hammertail in Queen Anne's Co., Maryland (6/13/2021). (c) pcowartrickmanphoto, some rights reserved (CC BY-NC). View Record Details Media by Pamela Cowart-Rickman.

A Sand Hammertail in Worcester Co., Maryland (Date obscured). (c) Jim Brighton, some rights reserved (CC BY-NC). View Record Details Media by Jim Brighton.

Sand Hammertail in St. Mary's Co., Maryland (7/2/2023). (c) Pablo Tapia Ossa, some rights reserved (CC BY-NC). View Record Details Media by volteka via iNaturalist.

A Sand Hammertail in Kent Co., Maryland (7/3/2020). (c) pcowartrickmanphoto, some rights reserved (CC BY-NC). View Record Details Media by Pamela Cowart-Rickman.

Sand Hammertail in St. Mary's Co., Maryland (7/2/2023). (c) Pablo Tapia Ossa, some rights reserved (CC BY-NC). View Record Details Media by volteka via iNaturalist.

Sand Hammertail in Calvert Co., Maryland (7/2/2025). (c) jugbayjs, some rights reserved (CC BY-NC). View Record Details Media by jugbayjs via iNaturalist.

A Sand Hammertail in Caroline Co., Maryland (5/26/2019). (c) Elizabeth Green, some rights reserved (CC BY-NC-ND). View Record Details Media by Elizabeth Green via iNaturalist.

A Sand Hammertail in Caroline Co., Maryland (6/21/2020). (c) Aaron, some rights reserved (CC BY-NC). View Record Details Media by Aaron via iNaturalist.

A male Sand Hammertail in Anne Arundel Co., Maryland (7/26/2015). Verified by Herschel Raney/BugGuide. View Record Details Media by Bill Hubick.