Ant nests provide environmentally stable environments that are well organized and protected by the host colony. The benefit of ant colonies has resulted in infiltration from a variety of myrmecophiles. The ant guests can have a positive, neutral, or negative effect on the colony. If the infiltrating species' impact is too negative on the colony, they risk discovery; this usually results in relatively small populations of myrmecophiles. Some spider species will use traits such as myrmecomorphy – ant mimicry - and chemical mimicry to infiltrate ant nests, usually to prey on food supplies or the ants themselves. "Aribates javensis", a species of oribatid mites, is an obligate myrmecophile that lives in ant nests. These mites are cared for by their ant hosts in exchange for eating litter and bacteria in the nest.