Annet, Isles of Scilly have nationally important breeding populations. The storm–petrel breeds amongst the boulders of the more stable storm beaches. The largest population of Manx shearwater ("Puffinus puffinus") in the islands breed here and the other annual breeding species are puffin ("Fratercula arctica"), greater black-backed gull ("Larus marinus"), razorbill ("Alca torda"), kittiwake ("Rissa tridactyla"), fulmar ("Fulmarus glacialis"), herring gull ("L. argentatus") and shag ("P. aristotelis"). Common tern ("Sterna hirundo") breed on the island most years as do cormorant ("Phalacrocorax carbo") and very rarely Arctic tern ("S. paradisaea"). Annet has long had a reputation for being the best island for breeding birds and Jessie
Wedge-tailed shearwater (in common with the other shearwaters) as an adaptation for swimming. This species is related to the pan-Pacific Buller's shearwater, which differs much in colour pattern, but also has a wedge tail and a thin black bill. They make up the "Thyellodroma" group, a superspecies of the large shearwaters that were for a long time included in the genus "Puffinus". Wedge-tailed shearwaters feed pelagically on fish, squid and crustaceans. Their diet is 66% fish, of which the most commonly taken is goatfish. It was thought that the species mostly took food from surface feeding, observations of feeding wedge-tails suggested that