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The evolution of parental care is a complex process, and many evolutionary pathways have been hypothesized. Maternal care is common, but paternal care is not. High confidence of paternity should favor the evolution of paternal attendance in caring for young; biparental care is rare because paternity assurance is typically low compared to maternity. Biparental care in insects has evolved several times and has high diversity. To evaluate the conditions for the evolution of biparental care, a comparison across taxa is suitable. In this review, common traits of biparental species are discussed in order to evaluate previous models of biparental care and the life history of insects. It will be shown that nesting is a common feature in biparental insects. Nest structure limits extra-pair copulations, contributing to the evolution of biparental care.