Chickens are birds that are often kept on farms. Roosters are male chickens, hens are female chickens and chicks are baby chickens. A mother hen keeps her chicks tucked under her wings, where they are safe. Purple level titles introduce a variety of topics to promote reading for pleasure and offer plenty of opportunities to look at rhyme and rhythm within words to build fluency and phrasing. PM Non-fiction books are carefully researched, presenting factual information accompanied by superb photography and realistic illustrations to engage young readers.