Roger Duvoisin was born in Geneva, Switzerland on August 28, 1904. Before becoming a children's book illustrator, he designed and painted murals, theatrical scenery, and posters as well as worked in the fashion industry. He immigrated with wife Louise Fatio to the United States in 1925. He created more than 40 books and illustrated more than 140 children's books. He created several animal characters including Petunia the foolish goose, Veronica the hippo, Crocus the crocodile, Jasmine the cow, Donkey-Donkey and Hector-Penguin. He also illustrated the Happy Lion series written by his wife. He received several awards for his works including the Caldecott Award for White Snow Bright Snow… written by Alvin Tresselt in 1948 and the Caldecott Honor Award for Hide and Seek Fog also written by Tresselt in 1966. He also received the Society of Illustrators Award, the Rutgers Award, the Silver Medallion of the University of Southern Mississippi and the Kerlan Award from the University of Minnesota. He died on June 30, 1980.