These storks mate for life. Both male and female storks build their nest together and share parental duties. This bird creates an unusually large nest. The nest can measure 1.5 meters (nearly 5 ft.) in diameter and 1 meter (3.3 feet) thick. Breeding season begins in May. Two to five eggs are laid in a large stick nest over 2 days. Eggs are incubated by both parents and hatch in about 36 days. Young take flight around the age of 3 months and attain sexual maturity in 3 years.