Pheidole morrisi is a common soil-nesting ant in sandy habitats in southeastern North America. This photo shows a major (left) and minor worker from the same colony. Orlando, Florida, USA

Portrait of an Dorylus driver ant soldier. Kibale forest, Uganda

Dorylus driver ants are quick to defend their colonies. Here, a soldier bites down on an intruding myrmecologist. This behavior has been co-opted by traditional medicine in some cultures to make sutures of ant heads. Kibale forest, Uganda