During the breeding season will continue to chirp and fiercely defend their nests and mates . Both males and females **** together with their mouths to dig a hole in the ground for a nest on the shore or the bank of a lake or river. Digging may take up to 11 weeks, usually within a month. Three days later the female lays her eggs. The couple **** incubate together and the chicks are blind when they hatch, but after five days they can see and develop feathers. The annual egg-laying period is in the north (September to March) and in the south (April to August) . In equatorial regions, nesting and egg-laying can take place at any time of the year.