Rowley is a loyal friend, but he sometimes behaves in an immature or childish manner. Figaro is based on and acts like an immature and spoiled little boy. These progenitor cells initially transform into immature dendritic cells. Juvenile male chimpanzees have been recorded mounting and copulating with immature chimps. Males also are capable of mating at both immature and mature stages of their lives. His teachers considered him immature and lacking physical and emotional development. Drop behavior differs between adult and immature western gulls. He remains an extremely disturbed, immature, and dangerous man. They are classified into pathological, immature, neurotic and "mature" defences. The plumage of immature pelicans is darker than that of adults. Bitter compounds tend to accumulate in immature tuber tissues of white and yellow yams. They are divided into two types&colon; mature and immature. Sei whales for instance are divided into categories such as immature, pubertal and mature. The plumage of the immature is brown. Andersen visits the school but departs unconvinced by the boys' immature behavior.