The Japanese population is in decline, but the downward trend is especially pronounced in rural areas. The loss of people might be expected to lead to a resurgence of wildlife. But paradoxically, where farms have been abandoned, wildlife is also disappearing.

Researchers say that small farms in the Japanese foothills have created mosaic landscapes with rice paddies, open pastures, and scattered woodlands that provide homes to many kinds of wildlife. Where humans cut down trees for firewood and gathered leaves for fertilizer, they made room for orchids and azaleas, Nature reports. Where farmers dug rice paddies, they made a home for rice fish and heike fireflies. Broadly speaking, many species found on farms have evolved together with humans, scientists say.