The skylark has become emblematic of the farmland bird crisis, with population declines of 50% since 1970 reflecting welfare impacts from changed agricultural practices.
Skylark welfare decline reflects the population-level consequences of landscape change on individual bird welfare outcomes. Skylarks are ground-nesting birds that require open agricultural land - but the specific character of that land has changed dramatically since the mid-20th century in ways that systematically reduce nesting success. The shift from spring-sown to autumn-sown cereal crops means that by the time skylarks begin nesting in April, crop canopy has already closed to the point where skylarks cannot land or nest. Nesting in field margins exposes eggs and chicks to predation risk from foxes, corvids, and other predators. Chick survival depends on adequate invertebrate prey, which has declined throughout agricultural landscapes with pesticide use. Individual skylarks experiencing repeated nest failure across multiple breeding attempts within a season face not only lost reproductive investment but the energetic cost of incubation and brooding that must be repeated. The simple intervention of skylark plots - 2m x 2m undrilled patches within cereal fields - provides landing and nesting opportunities that have been shown to increase breeding success substantially at low cost to farmers.