GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Ants. Two unidentified ants (family Formicidae) standing face-to-face. Ants are social insects, living in colonies that may comprise several million individuals. Most members of a colony are workers. Some possess large, powerful jaws (as seen here, centre and upper left) that may be used for cutting food. If the jaws are used principally to defend the colony from attackers, the workers are referred to as soldiers.
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