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Parasitic Xenox trigrinus bee flies (Bombyliidae) dry their wings after emerging from the carpenter bee burrow where their mother laid eggs. Urbana, Illinois, USA
Bristle Fly - Tachinidae Urbana, Illinois, USA
An Ant-Decapitating Fly (Phoridae, Pseudacteon sp.) attempts to separate a fire ant (Solenopsis macdonaghi) from her nestmates. Lone ants make easier targets. Parque Nacional El Palmar, Entre Rios, Argentina
Solenopsis macdonaghi fire ants attacked by a Pseudacteon ant-decapitating fly. Parque Nacional El Palmar, Entre Rios, Argentina
One of the defenses fire ants (Solenopsis sp.) employ against parasitic phorid flies (Pseudacteon sp.) is to hide. It is thought that the effectiveness of the flies in controlling pest fire ant populations is due more to disruption of the ants' normal foraging behavior than to the parasitism itself. Parque Nacional El Palmar, Entre Rios, Argentina
A trio of parasitic phorid flies (Pseudacteon lontrae) hover over an ant nest (Linepithema oblongum) looking for targets. Termas de Reyes, Jujuy, Argentina
An Ant-Decapitating Fly (Phoridae, Pseudacteon sp.) attempts to oviposit on a fire ant (Solenopsis macdonaghi). Parque Nacional El Palmar, Entre Rios, Argentina
An Ant-Decapitating Fly (Phoridae, Pseudacteon sp.) attempts to separate a fire ant (Solenopsis macdonaghi) from her nestmates. Lone ants make easier targets. Parque Nacional El Palmar, Argentina
Parasitic Xenox trigrinus bee flies (Bombyliidae) dry their wings after emerging from the carpenter bee burrow where their mother laid eggs.

Urbana, Illinois, USA
Parasitic Xenox trigrinus bee flies (Bombyliidae) dry their wings after emerging from the carpenter bee burrow where their mother laid eggs. Urbana, Illinois, USA
Parasitic Xenox trigrinus bee flies (Bombyliidae) dry their wings after emerging from the carpenter bee burrow where their mother laid eggs.

Urbana, Illinois, USA
See photo in original gallery.
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all images and text © Alex Wild 2001-2013