Hedges (boxwood or thorn bushes) were much used by farmers until the early 20th century to protect crops, flora and fauna, and delimit plots of land. They are the preferred nesting sites of many breeding or migrating birds. They also serve as a hide, not only for birds of prey such as buzzards, sparrowhawks or harriers, but also for insect-eating bids like the Hodgson's redstart and shrike. The berries of certain shrubs (sloe, juniper and dog rose) turn these hedges into larders for seed-eating birds: thrushes, northern grosbeak-canary, ortolan buntings, etc.