Three crossbill species breed in the UK, all dependent on conifer seed crops. Their nomadic lifestyle means welfare depends on locating abundant cone crops across a wide area.
Crossbill welfare in years of widespread cone crop failure involves nutritional stress and nomadic movement over large distances. Young birds fledging during poor cone years face higher mortality than those in flush years. The welfare of crossbills is tied to the structural diversity of conifer forests — including a mixture of species and ages that creates asynchronous cone crops and reduces the risk of complete regional food failure in any single year.