Australian Ants - Alex Wild Photography
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Many ant colonies keep guards posted at their nest entrances. This Camponotus ephippium ant's head is nearly the same size as the nest entrance, forming a plug that she will only move to let her nestmates come and go.

Victoria, Australia

Many ant colonies keep guards posted at their nest entrances. This Camponotus ephippium ant's head is nearly the same size as the nest entrance, forming a plug that she will only move to let her nestmates come and go. Victoria, Australia

Camponotus ephippiumnest guardingant headliving doorplugnest entranceant nestcastesFormicinaeformicidaeinsectsbugsinsectbehaviorantsecology