Bigwig is a rabbit who was formerly an officer in the Sandleford Owsla. He is the largest and the most powerful of Sandleford survivors, and is often blunt and impatient for dangerous action and fighting. When he was almost killed by a snare in Cowslip's warren, he realizes that Fiver is right more often than not. He quickly befriends a seagull named Kehaar and often asks for his help on Hazel's behalf. Hazel often selects him for the most dangerous missions, such as the infiltration of Efrafa. Later, he becomes captain of the Watership Down's Owsla and falls for Spartina, a doe from Darkhaven.