Harvesters are enormous Machines that appear in The Matrix films and other related media. These hulking mechanoids are built to tend to the Machines' foetus fields where new human foetuses are produced. Using their hollow tentacles, Harvesters collect foetus sacs and deposit them into the large silos on their backs before taking them to the Machines' power plants where their minds are connected to the Matrix and their bodies become batteries, providing bio-electric energy to power the Machines.
Given the importance of their function, Harvesters are heavily armoured and cannot be easily brought down. They can use their tentacles to fight off any intruders in the fields but will normally rely on Sentinels for protection. During the early days of the Machine War, Harvesters were smaller and armed with lasers. They made terrifying combatants as they would pull human pilots out of their APU's, snapping off their limbs which were fastened inside the mechs.