Complex sentence: The incubation period is of varied lengths, but usually takes 25 to 26 days, with both sexes sharing duties, although the male usually defends the territory until the female reaches the middle of her incubation period.
Split into simpler sentences: The incubation period is of varied lengths, but usually takes 25 to 26 days. Both sexes share duties, although the male usually defends the territory until the female reaches the middle of her incubation period.