Her nest disturbed by the photographer, a Solenopsis thief ant worker exudes a droplet of venom on her stinger and waves it in the air. This behavior is known as "gaster-flagging".

Morretes, Paraná, Brazil
Her nest disturbed by the photographer, a Solenopsis thief ant worker exudes a droplet of venom on her stinger and waves it in the air. 

Morretes, Paraná, Brazil
A Solenopsis worker stands guard over an exposed pile of larvae.

Morretes, Paraná, Brazil
Her nest disturbed by the photographer, a Solenopsis thief ant worker exudes a droplet of venom on her stinger and waves it in the air. 

Morretes, Paraná, Brazil
Inside a laboratory nest a young fire ant queen (Solenopsis invicta) tends to her first eggs. In nature, the queen seals herself in an underground chamber and raises the first workers on her body reserves.

Laboratory colony at the University of Central Florida, USA
Inside a laboratory nest a young fire ant queen (Solenopsis invicta) tends to her first eggs. In nature, the queen seals herself in an underground chamber and raises the first workers on her body reserves.

Laboratory colony at the University of Central Florida, USA
Myrmecologists often start new laboratory colonies from young mated queens. This Solenopsis molesta thief ant queen was collected after her midsummer mating flight and placed in a standard test tube nest.

University of Illinois at Urbana-Champaign, Illinois, USA
Myrmecologists often start new laboratory colonies from young mated queens. This Solenopsis molesta thief ant queen was collected after her midsummer mating flight and placed in a standard test tube nest.

University of Illinois at Urbana-Champaign, 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
Her nest disturbed by the photographer, a Solenopsis thief ant worker exudes a droplet of venom on her stinger and waves it in the air. This behavior is known as "gaster-flagging".

Morretes, Paraná, Brazil
Her nest disturbed by the photographer, a Solenopsis thief ant worker exudes a droplet of venom on her stinger and waves it in the air. This behavior is known as "gaster-flagging".

Morretes, Paraná, Brazil
Her nest disturbed by the photographer, a Solenopsis thief ant worker exudes a droplet of venom on her stinger and waves it in the air. This behavior is known as "gaster-flagging".

Morretes, Paraná, Brazil
See photo in original gallery.
all images and text © Alex Wild 2001-2013