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Ant, Army

Army ants will split into groups when the size of the colony has reached a size threshold which happens approximately every three years. Wingless virgin queens will hatch among a male sexual brood that will hatch at a later date. When the colony fissions, there are two ways new queens are decided. A possible outcome is a new queen will stay at the original nest with a portion of the workers and the male brood while the old queen will leave with the other portion of workers and find a new nest. Another possibility is that the workers will reject the old queen and new queens will head the two new colonies. The workers will affiliate with individual queens based on the pheromone cues that are unique to each queen. When new bivouacs are formed, communication between the original colony and the new bivouacs will cease to exist.

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