White stork
Though monogamous, the birds do not pair for life. Pairs build a large stick nest, which may be used for several years. Each year the female may lay a clutch of four eggs, which hatch roughly 33–34 days after being laid. Both parents take turns incubating the eggs, and both feed the young. The young leave the nest 58–64 days after hatching, and are fed by the parents for another 7–20 days.