Adults feed on grass, seeds and shoots; they also take some insects during the breeding season. The young feed completely on invertebrates such as sawflies, beetles and aphids for the first 2 weeks after hatching (2). The breeding season lasts between mid-April and early September. During this relatively long period, just one brood is produced; but as the clutch can contain up to 16 eggs (one of the largest clutches of any living bird species) this is perhaps understandable. If the clutch is lost, however, an emergency 'replacement brood' can be produced (2). Nests are usually well hidden at the base of a hedge or clump of vegetation, and consist of a scrape in the ground lined with grass and leaves (2). After the breeding season, grey partridges form groups known as 'coveys' (2).