 They favour leguminous seeds and also eat seeds of knotweed ("Polygonum"), buckwheat ("Fagopyrum"), "Salicornia", "Artemisia", camelthorn ("Alhagi"), rock rose ("Helianthemum") and asphodel ("Asphodelus").In cultivated areas they take grain and the seeds of leguminous crops.Beetles and other small invertebrates are sometimes eaten and grit is consumed to help grind up the contents of the crop.