The western cliffs are the site of colonies of terns, guillemots, fulmars and eider ducks. The fulmars are tubenosed seabirds of the family Procellariidae. The two fulmars are closely related seabirds occupying the same niche in different oceans. Some birds, such as fulmars, employ regurgitation as a defense when threatened. "Indomitable" carried one squadron each of Fairey Fulmars and Hawker Sea Hurricanes. "Victorious" had the Albacores of 827 and 828 NAS and the Fulmars of 809 NAS. The strike was met by defending Fulmars and heavy anti-aircraft fire. Two of the Fulmars were brought down by friendly fire. Another six Fulmars from 803 and 806 Squadrons arrived after "Hermes" had already sunk. Nine Swordfish and five Fulmars were destroyed during the attack. Five aircraft had turned back with mechanical failures but the rest evaded four Fulmars.