Grey-legged Slender Fly
Orange Slender Fly
Orange-legged Slender Fly
Line-legged Slender Fly
Brown-legged Slender Fly
Black-legged Slender Fly
Wasp-mimic Robber Fly I
Wasp-mimic Robber Fly II
Zebra Robber Fly I
Zebra Robber Fly II 


Common Brown Robber Fly - Zosteria rosevillensis

Family Asilidae

This page contains pictures and information about Common Brown Robber Flies that we found in the Brisbane area, Queensland, Australia.

Body length 25mm, female
This Common Brown Robber Fly is the most commonly seen Robber Fly in Brisbane bushlands. This is a dark species. The robber fly has black femora and tarsi. The tibiae is orange-brown with black apices.
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Notice its slender antennal style. The abdomen is greyish black when viewed dorsally, yellow-grey when viewed laterally.  
Robust flies are with noticeable "beard" of setae around the face. It is believed that they serve as protection to their face from damage by their prey. 
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This robber fly is usually seen resting on stem or leaves, sometimes feeding on prey. The above pictures show the Robber Flies just captured a Honey Bee. Robber Flies are air hunter. They also known as an Assassin Fly and Bee Killer. They have strong legs which capture prey on flight. 
1. A revision of Neoaratus Ricardo, with the description of six allied new genera from the Australian region (Diptera : Asilidae : Asilini) - G Daniels, 1987.
2. Zosteria spec. - Wikimedia Commons.
3. Asilini - Australian Asilidae - Dr. Robert Lavigne, Honorary Research Associate, South Australian Museum, Adelaide, SA. 
4. Family ASILIDAE Robber Flies - Australian Biological Resources Study, Australian Faunal Directory.

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Up ] Black-legged Slender Robber Fly ] Yellow Slender Rubber Fly ] Yellow-legged Slender Robber Fly ] Black Slender Robber Fly ] Brown Slender Robber Fly ] Red-legged Robber Fly ] Red Rubber Fly ] Large Brown Rubber Fly ] Line-legged Brown Rubber Fly ] Dusted Robber Fly ] Dark Robber Fly ] [ Common Brown Robber Fly ] Orange Robber Fly ] Line-legged Robber Fly ] Reddish Robber Fly ]


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Last updated: October 21, 2012.