The fighting bull is a species that notoriously represents Spanish identity. However, it is commonly forgotten that before bulls become the central character of this national 'fiesta', this animal has grown up in and been part of a rich natural environment. We examines the ecological complexity surrounding the life and development of a bull, in all stages, to know the role playing by him within the countryside in which he grows up, from gestation and birth until reaching four years of life in freedom and is taken to the bullring.