What animals that can be found in gardens and range from 0.2 mm - 4 mm could be a possible candidate for domestication to a race of tiny humanoids?
Scientists had previously established that certain types of aphids live in colonies where they are used as a food source by a neighbouring colony of ants. The ants have been known to bite the wings off the aphids in order to stop them from getting away and depriving the ants of one of their staple foods: the sugar-rich sticky honeydew which is excreted by aphids when they eat plants. Chemicals produced in the glands of ants can also sabotage the growth of aphid wings. The new study shows, for the first time, that ants' chemical footprints -- which are already known to be used by ants to mark out their territory - also play a key role in manipulating the aphid colony, and keeping it nearby.