An Eastern Hammertail in Montgomery Co., Maryland (07/21/2017).
A male Eastern Hammertail near Loch Raven Reservoir, Baltimore Co., Maryland (8/28/2007).
A female Eastern Hammertail in Baltimore City, Maryland (6/6/2007). Determined by Herschel Raney/BugGuide.
An Eastern Hammertail in Harford Co., Maryland (8/16/2013).
A male Eastern Hammertail in Caroline Co., Maryland (7/15/2020). Determined by Chris Cohen and Ken Wolgemuth/BugGuide.
An Eastern Hammertail in Montgomery Co., Maryland (8/28/2017).
An Eastern Hammertail in Baltimore Co., Maryland (8/1/2020). (c) Frode Jacobsen, some rights reserved (CC BY-NC).
A female Eastern Hammertail in Dorchester Co., Maryland (9/1/2017). Determined by Bob Biagi/BugGuide.
An Eastern Hammertail in Baltimore Co., Maryland (7/1/2020). (c) Frode Jacobsen, some rights reserved (CC BY-NC).
A female Eastern Hammertail in Anne Arundel Co., Maryland (9/11/2014).
Photo by
Bill Hubick
MBP List
A female Eastern Hammertail in Anne Arundel Co., Maryland (9/11/2014).
A female Eastern Hammertail in Anne Arundel Co., Maryland (9/11/2014). Determined by Steve Collins.
Photo by
Bill Hubick
MBP List
An Eastern Hammertail in Baltimore Co., Maryland (8/17/2020). (c) Frode Jacobsen, some rights reserved (CC BY-NC).
An Eastern Hammertail in Howard Co., Maryland (9/12/2014).
An Eastern Hammertail feeding on prey in Harford Co., Maryland (7/28/2010).
A female Eastern Hammertail with prey in Baltimore City, Maryland (9/10/2008). Determined by Herschel Raney/BugGuide who notes, E. aestuans "love cloth and pants and shirts."
An Eastern Hammertail in Howard Co., Maryland (9/12/2014).
An Eastern Hammertail in Montgomery Co., Maryland (7/11/2017). Determined by Ben Coulter.
A female Eastern Hammertail in Dorchester Co., Maryland (8/8/2019). Determined b Bob Biagi/BugGuide.
Eastern Hammertail with Diptera prey in Anne Arundel Co., Maryland (8/26/2017). (c) Bill Hubick, all rights reserved.
Map Snapshot
34 Records
Status
Can be very common in open habitats. This species lands on whatever surface is convenient, and may even land on observers. 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 Nerax.
Description
Female has long, distinctive ovipositor.
Seasonality Snapshot
Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.
An Eastern Hammertail in Montgomery Co., Maryland (07/21/2017).
View Record Details
Media by
Steve Scholnick.
A male Eastern Hammertail near Loch Raven Reservoir, Baltimore Co., Maryland (8/28/2007).
View Record Details
Media by
Steve Collins.
A female Eastern Hammertail in Baltimore City, Maryland (6/6/2007). Determined by Herschel Raney/BugGuide.
View Record Details
Media by
Thomas Wilson.
An Eastern Hammertail in Harford Co., Maryland (8/16/2013).
View Record Details
Media by
Mark Johnson.
A male Eastern Hammertail in Caroline Co., Maryland (7/15/2020). Determined by Chris Cohen and Ken Wolgemuth/BugGuide.
View Record Details
Media by
Dave Webb.
An Eastern Hammertail in Montgomery Co., Maryland (8/28/2017).
View Record Details
Media by
Steve Scholnick.
An Eastern Hammertail in Baltimore Co., Maryland (8/1/2020). (c) Frode Jacobsen, some rights reserved (CC BY-NC).
View Record Details
Media by
Frode Jacobsen.
A female Eastern Hammertail in Dorchester Co., Maryland (9/1/2017). Determined by Bob Biagi/BugGuide.
View Record Details
Media by
Mark Etheridge.
An Eastern Hammertail in Baltimore Co., Maryland (7/1/2020). (c) Frode Jacobsen, some rights reserved (CC BY-NC).
View Record Details
Media by
Frode Jacobsen.
A female Eastern Hammertail in Anne Arundel Co., Maryland (9/11/2014).
Media by
Bill Hubick.
A female Eastern Hammertail in Anne Arundel Co., Maryland (9/11/2014).
View Record Details
Media by
Bill Hubick.
A female Eastern Hammertail in Anne Arundel Co., Maryland (9/11/2014). Determined by Steve Collins.
Media by
Bill Hubick.
An Eastern Hammertail in Baltimore Co., Maryland (8/17/2020). (c) Frode Jacobsen, some rights reserved (CC BY-NC).
View Record Details
Media by
Frode Jacobsen.
An Eastern Hammertail in Howard Co., Maryland (9/12/2014).
View Record Details
Media by
Kurt Schwarz.
An Eastern Hammertail feeding on prey in Harford Co., Maryland (7/28/2010).
View Record Details
Media by
Bill Adams.
A female Eastern Hammertail with prey in Baltimore City, Maryland (9/10/2008). Determined by Herschel Raney/BugGuide who notes, E. aestuans "love cloth and pants and shirts."
View Record Details
Media by
Thomas Wilson.
An Eastern Hammertail in Howard Co., Maryland (9/12/2014).
View Record Details
Media by
Kurt Schwarz.
An Eastern Hammertail in Montgomery Co., Maryland (7/11/2017). Determined by Ben Coulter.
View Record Details
Media by
Esther Smith.
A female Eastern Hammertail in Dorchester Co., Maryland (8/8/2019). Determined b Bob Biagi/BugGuide.
View Record Details
Media by
Mark Etheridge.
Eastern Hammertail with Diptera prey in Anne Arundel Co., Maryland (8/26/2017). (c) Bill Hubick, all rights reserved.
View Record Details
Media by
Bill Hubick.
Source: Wikipedia
| Efferia aestuans | |
|---|---|
| |
| Efferia aestuans male | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Diptera |
| Family: | Asilidae |
| Genus: | Efferia |
| Species: | E. aestuans
|
| Binomial name | |
| Efferia aestuans | |
| Synonyms | |
Efferia aestuans is a species of insect in the family Asilidae, the robber flies. It is native to eastern North America, where it ranges from Ontario and New Hampshire south into Florida and New Mexico.[1] It was originally described as Asilus aestuans in Carl Linnaeus' 1763 work Centuria Insectorum.[2]
It reaches a body length of 18 mm in males and 23 mm in females.[3]
References
[edit]- ^ "Species Efferia aestuans - BugGuide.Net". Retrieved January 18, 2009.
- ^ "Asilus aestuans Linnaeus, 1763". Integrated Taxonomic Information System.
- ^ "Species Efferia aestuans".
External links
[edit]
Media related to Efferia aestuans at Wikimedia Commons
 | This article related to members of the fly family Asilidae is a stub. You can help Wikipedia by expanding it. |