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robber fly with food

robber fly with food
Photo Information
Copyright: Ka Lis (avallaunius) Silver Star Critiquer/Silver Note Writer [C: 27 W: 8 N: 44] (230)
Genre: Animals
Medium: Color
Date Taken: 2009-07-21
Categories: Insects
Camera: canon PowerShot G9
Exposure: f/8, 1/8 seconds
More Photo Info: [view]
Photo Version: Original Version
Date Submitted: 2009-08-07 0:26
Viewed: 3169
Points: 6
[Note Guidelines] Photographer's Note
for robber flies:

Order: Diptera
Suborder: Brachycera
Superfamily: Asiloidea
Family: Asilidae
Species: ?

Robber flies is the common name of flies in the Diptera family Asilidae. The family Asilidae contains about 7,100 described species worldwide. All robber flies have stout, spiny legs, a dense moustache of bristles on the face (mystax), and 3 simple eyes (ocelli) in a characteristic depression between their two large compound eyes. The mystax helps protect the head and face when the fly encounters prey bent on defense. The antennae are short, 3-segmented, sometimes with a bristle-like structure called an arista. The short, strong proboscis is used to stab and inject victims with saliva containing neurotoxic and proteolytic enzymes which paralyze and digest the insides; the fly then sucks the liquefied meal through the proboscis. Many species have long, tapering abdomens, sometimes with a sword-like ovipositor. Others are fat-bodied bumblebee mimics. Adult robber flies attack other flies, beetles, butterflies and moths, various bees, dragon and damselflies, Ichneumon wasps, grasshoppers, and some spiders.

and for notonecta (the food):

Order: Hemiptera
Suborder: Heteroptera
Infraorder: Nepomorpha
Family: Notonectidae
Species: Notonecta glauca (?)

Notonectidae is a cosmopolitan family of aquatic insects in the order Hemiptera, commonly called backswimmers because they swim upside down. They are all predators, up to nearly 2 cm in size. They are similar in appearance to corixidae (Water boatmen), but can be separated by differences in their dorsal-ventral coloration, front legs, and predatory behavior.
The most common genus of backswimmers is Notonecta - streamlined, deep-bodied bugs up to 16 mm long, green, brown or yellowish in colour. As the common name indicates, these aquatic insects swim on their backs, vigorously paddling with their long, hair-fringed hind legs

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To CatherineD: hiavallaunius 1 08-08 14:24
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Critiques [Translate]

  • Great 
  • joska Gold Star Critiquer/Gold Note Writer [C: 806 W: 0 N: 4092] (22535)
  • [2009-08-07 3:30]

Very good macro, congratulations!

Bella foto, que buen macro y excelente el momento captado.

Hi Nikos

That is a very unusual prey item. YOu've done a great job here, I do like teh details around the head. Good composition.


Geia sou Niko,
This Notonectidae has not chance in the "arms" of the Robber fly. Excellent capture, with good timing and sharpness. Unusual subject... Xairetw,

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