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

Nylanderia sp. recruiting in large numbers to an insect carcass. Cape York Peninsula, Queensland, Australia

A Simopelta queen with attendant workers running in a column. Her abdomen apparently exudes an attractant that keeps the attention of the following ant whose mouthparts are held open above abdominal segment 4. Parque Nacional Henri Pittier, Venezuela