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Colonies of army ants are large compared to the colonies of other Formicidae. Colonies can have over 15 million workers and can transport 3000 prey (items) per hour during the raid period. [14] [20] When army ants forage, the trails that are formed can be over 20 m (66 ft) wide and over 100 m (330 ft) long. [20]
The army ants never reside in one location and do not build permanent nests. Therefore, they forage and hunt in different locations and emigrate periodically. [ 7 ] The Queen are wingless and contain expandable abdomens that allow them to produce millions of eggs per month, which allows variation to occur within the species.
Ant colonies have a complex social structure. Ants’ jobs are determined and can be changed by age. As ants grow older their jobs move them farther from the queen, or center of the colony. Younger ants work within the nest protecting the queen and young. Sometimes, a queen is not present and is replaced by egg-laying workers.
Neivamyrmex sumichrasti, like other army ants, live in large colonies and forage through raiding.It raids both diurnally and nocturnally. [5] The raids most often take place above ground while its bivouac sites are presumably subterranean. [8]
The ants can detect the pheromones with their antennae and can tell the difference in concentration gradients of the pheromones as they move away from the center of the trail. Also, individuals who are outbound, turn to avoid the inbound ants more frequently, giving the prey-burdened ants the right-of-way on the trail. [16]
Eciton army ants have a bi-phasic lifestyle in which they alternate between a nomadic phase and a statary phase. In the statary phase, which lasts about three weeks, the ants remain in the same location every night. They arrange their own living bodies into a nest, protecting the queen and her eggs in the middle.
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Local arthropod densities remain stable even in the presence of a foraging colony of the ants, in sharp contrast to the decimation a colony of typical army ants imposes on local arthropods.2 Above ground foraging driver and army ants have been observed collecting upwards of 90,000 insects per day in their raids, a number which Even juvenile ...