Hazel grouse are forest birds of European boreal and mixed woodland that are declining as intensive forestry reduces the structural diversity they require for nesting, foraging, and cover.
Hazel grouse in structurally simple managed forest lack the dense low cover required for predator avoidance during ground nesting. Clear-cut areas provide no suitable habitat for decades. Chicks require dense undergrowth and diverse invertebrate prey that is reduced in simplified forest stands. Traditional continuous cover forestry that maintains structural diversity provides dramatically better conditions for hazel grouse welfare and reproduction.