Ants run secret farms on English oak trees, photographer discovers

Brown ants herd and milk giant pale aphids, building barns for them from beetle exoskeleton

Britain has a new farmed animal, which is kept in barns, milked and moved between high and low pastures - but not by humans.

The giant pale aphid, Stomaphis wojciechowskii, has lived undiscovered for thousands of years on English oak trees, where it has been looked after by brown ants.