Insect Identification
Insect Identification Facebook Logo
Insect Identification

Robber Fly (Diogmites) - (Diogmites sp.)

Authored By Staff Writer | Last Updated: 8/28/2014

Robberflies are hanging thieves in the insect world. They are always ready to drop and go when a good-looking meal flies by.

Picture of Robber Fly (Diogmites)
Pic of the Robber Fly (Diogmites)
Image of the Robber Fly (Diogmites)
View All Images (4)

Robber flies eat biting flies and other flying insects like bees, butterflies and wasps. This species likes bees and dragonflies best as well as biting flies. During the day, they literally hang from branches or objects near the ground with their front legs, waiting to ambush passing prey. They are fast and noisy fliers, giving chase to insects that are already in flight. When they overtake them, they grab them with their legs to stop them from escaping. Once captured, the robber fly will stop at a branch or leaf and use its stiff mouth to pierce the body of its victim and then suck out the victim's insides.

They make a loud whirring noise as they fly because they beat their wings so quickly. They may be mistaken for a bee or a wasp because of their size and the buzzing noise they create.

Robber flies come in a variety of species. The ones from the Diogmites genus have a few color variations and different striped markings on the abdomen per individuals.

Text ©2005-2014 All Rights Reserved. No Reproduction Permitted. Unauthorized use and/or duplication of this material without express and written permission from is strictly prohibited.

Category: Fly or Mosquito
Common name: Robber Fly (Diogmites)
Scientific Name: Diogmites sp.

  Kingdom: Animalia
   Phylum: Arthropoda
    Class: Insecta
     Order: Diptera
      Family: Asilidae
       Genus: Diogmites
        Species: sp.

Adult Size (Length): 18mm to 40mm (0.71in to 1.57in) COMPARE

Identifying Colors: brown; red; green; black

General Description: fast, flying, buzzing, metallic, shiny

North American Reach (Though Not Limited To*): Alabama; Alaska; Arizona; Arkansas; California; Colorado; Connecticut; Delaware; Florida; Georgia; Hawaii; Idaho; Illinois; Indiana; Iowa; Kansas; Kentucky; Louisiana; Maine; Maryland; Massachusetts; Michigan; Minnesota; Mississippi; Missouri; Montana; Nebraska; Nevada; New Hampshire; New Jersey; New Mexico; New York; North Carolina; North Dakota; Ohio; Oklahoma; Oregon; Pennsylvania; Rhode Island; South Carolina; South Dakota; Tennessee; Texas; Utah; Vermont; Virginia; Washington; West Virginia; Wisconsin; Wyoming; Alberta; British Columbia; Manitoba; New Brunswick; Newfoundland and Labrador; Nova Scotia; Ontario; Prince Edward Island; Quebec; Saskatchewan; Mexico

* Keep in mind that insect reach is not governed by lines on a map and therefore may appear in areas/regions/states beyond those listed above.

NOTE: Material presented throughout this website is for entertainment value and should not to be construed as usable for scientific research or medical advice (insect bites, etc...). Please consult licensed, degreed professionals for such information. Email corrections / Comments to InsectIdentification at Gmail dot com.
BugFinder - Insects by Color or State
BugFinder allows for a quick search of the database by selecting primary color, secondary color, number of legs and the territory or state in question. If only one Primary color is present, select it again for Secondary color.
Primary Color:
Secondary Color:
Number of Legs:
General Category: