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BiologyMale corn buntings have a colourful sex life, and individuals have been known to mate with as many as 18 different females in a single breeding season. The male plays no part in incubating the eggs but does sometimes help with feeding the young. Three to five eggs are laid between late May and July, in a nest of dried grass built by the female in arable crops or rough grassy margins. The young are fed on insects, and the birds may produce two broods in the season, although one is more usual. Whilst adult corn buntings are primarily seedeaters, like many other seed-eating birds, they feed their young on invertebrates. They take weed seeds, as well as cereal.