Which parent builds and defends a tinamou nest?

In the order Tinamiformes, it is the male tinamou that is responsible for both constructing and defending the nest.1

The birds create their nests on the ground by clearing away debris to form a shallow depression, often concealing them beneath overhanging grass, fallen treetops, or tree buttresses. Following the laying of the eggs—which may involve multiple females contributing to a single nest—the male performs all incubation duties and continues to brood and guide the chicks for several weeks after they hatch.1