The eggs are maintained at , the female regulating the temperature of the eggs by varying the time spent sitting. She leaves the nest more with increasing air temperature, and incubates more tightly when the light intensity is lower early and late in the day. The female incubates the eggs for 16 to 19 days to hatching, and broods the chicks, which fledge in a further 17 to 22 days later. Both parents feed the chicks and fledged young, and in very hot weather, the female has been noted as taking drops of water to her chicks in her bill. This species becomes sexually mature after one year, and has an annual adult mortality of over 80 percent giving a life expectancy of around eight months, which is the shortest for any bird apart from a few "Coturnix" species. There are nonetheless records of an individual surviving to 4 years 10 months, and even a report of a bird ringed in Winchester in the UK in 1989 and found dead in Morocco 7 years and 7 months later.