of the kites to avoid nest predation. Other nest locations include the eaves of thatched roofs, stone walls and embankments, and electric junction boxes. In Bhutan, it nests in holes in the outer walls of monasteries, often alongside the Eurasian tree sparrow. In Sakhalin, it will sometimes build free-standing nests in bushes. The russet sparrow also uses the disused nests of the red-rumped swallow, and a pair of russet sparrows has been recorded attempting to oust a pair of black-crested tits from their nest. The male chooses the nest site, and uses it for his courtship display, spending much time calling nearby. When a female comes near a male at his nest the male begins to display by raising his head, drooping his wings, pushing his chest forward, and lowering his tail. He then bows up and down in front of the female, who will lunge and then fly away if unreceptive. Both sexes take part in building the nest, which consists of a loose, untidy bunch of dry grass which fills the nesting cavity, lined with fur and feathers for warmth. Eggs are elongated ovals, with a fine texture and a slight gloss. They are whitish in overall colour with a grey tinge and brown spots, streaks, or blotches. The average size of the egg is 19.2×14.2 millimetres (0.75×0.55 in). Eggs are similar to those of the Eurasian tree sparrow, differing in a duller colour and more narrow shape, though they cannot be separated from those of the other sparrows with certainty. Two clutches of four or sometimes five or six eggs are laid in a year. In Hokkaidō, clutches are laid between early May and early July, with two peaks in laying around mid May and late June. Both sexes incubate and feed the young, with the male often being more active in feeding the nestlings. In Hokkaidō, nestlings hatch weighing about , and fledge fourteen or fifteen days after hatching, weighing . The common cuckoo has been recorded in old literature as a brood parasite of the russet sparrow. Relationships with humans In parts of the range, the russet sparrow inhabits towns, and in most of its range, it occurs near cultivation, and is a minor pest of agriculture. Though it damages crops, it also feeds its nestlings largely on insect pests. In China, the russet sparrow has been recorded as a captive bird, kept with the