Cowslip is the so-called leader of his warren known as the warren of the shining wires. There is some doubt as to whether he is insane or totally evil. Hazel, Fiver and Bigwig first encounter him when they accompany Captain Holly to recover an injured Sandleford rabbit left there, only to learn the warren's terrible secret when Bigwig nearly becomes a victim and that the missing rabbit was a victim. He becomes angered by Hazel's warren when they help a group of his rabbits escape from his warren, and even helps Woundwort to get his revenge on them, however, as he himself states, "I'm a plotter, not a fighter" and he uses both sides for his own gain. Later he trades his seer, Silverweed, to Woundwort in exchange for the destruction of his escaped rabbit's warren.