As of 2016–2019, the IUCN Red List of mammals lists the Grévy's zebra as endangered, the mountain zebra as vulnerable and the plains zebra as near-threatened. Grévy's zebra populations are estimated at less than 2,000 mature individuals, but they are stable. Mountain zebras number near 35,000 individuals and their population appears to be increasing. Plains zebra are estimated to number 150,000–250,000 with a decreasing population trend. Human intervention has fragmented zebra ranges and populations. Zebras are threatened by hunting for their hide and meat, and habitat change from farming. They also compete with livestock for food and water and fencing blocks their migration routes. Civil wars in some countries have also caused declines in zebra populations. By the beginning of the 20th century, zebra skins were valued commodities and were typically used as rugs. In the 21st century, zebra hides still sell for $1,000 and $2,000, and they are taken by trophy hunters. Zebra meat was mainly eaten by European colonisers; among African cultures only the San are known to eat it regularly.