Species found in south America. The photo shows 2 male birds in the front and the female behind. They swim with their heads always down and are diving ducks. It is a brood parasite, laying its eggs often in the nest of the Red fronted Coot. The incubation period for the Black-headed Duck at about 24 days is shorter than that of the host's eggs. When hatched the duckling spends only a few hours in the nest before it is off looking after itself.