The clutch is usually two or three buff-white eggs blotched with sepia or grey-brown, particularly at the wide end. The average egg size for Asian birds was 19.3 x 12.9 mm (0.76 x 0.51 in) with a weight of 1.7 g (0.06 oz). Both adults incubate the eggs for 16–19 days prior to hatching and feed the chicks about ten times an hour until they fledge and for several days after they can fly. The fledging time can vary from 22–24 days to 25–30 days, though the latter estimates probably take into account fledged young returning to the nest for food. If a nest is destroyed, or the breeding attempt otherwise fails, a replacement clutch may be laid, typically with fewer eggs. Two nests in Arabia were used in spring and again in the autumn, but it is not known if the same pair were involved.