There are a number of differences between the books and the television series, most notably the changing of a number of characters from male to female. This included Adder, Weasel, Owl and Kestrel, who retained the markings of a male kestrel. Owl had also been known as Tawny Owl in the books. In addition to this, the books featured a family of lizards who became the newts of the television series. New characters like the Shrews, Hurkel and Measley were introduced. Plucky is also changed from being Bold's grandson to his son. There are females that are males now. They are Sinuous, The Big Owl and Hollow. The Fieldmice are now known as the Mice. Holly is now known as Hollow.