    Sentenee t hempensers sed some specses ate still athful not abh,  ‘swans and sta birds such as the allutrass which mate for fe and  ‘ace never tndalthful to their partners.    Sentence 2 temipersess said fidelity still euists in some species .  Notably swans and sea birds such as the albatross that mate for fe  and are never unkaithtul to their partners.    