Reproduction House Sparrows form monogamous pairs for each breeding season. Nests are built between February and May. House Sparrows nest in crevices inside and on buildings, and in coniferous and deciduous trees. Nests are built from dried vegetation, feathers, strings, and paper. Eggs are layed at any time in the nesting period. One to eight eggs can be present in a clutch, with the possiblity of four clutches per nesting season.
Incubation begins after all the eggs have been layed.
Both males and females incubate the eggs for short periods of a few minutes each. Incubation lasts for 10 to 14 days. Behavior House Sparrows tend to forage for food on the ground, using a hopping movement when not in flight. Their flight is direct, with continued flapping and no periods of gliding. House Sparrows aggressively protect a small teritorry just around their nesting site.