Falco peregrinus
Men-a-vaur () is to the north-west of St Helen's and consists of three granite slabs covering an area of and rising to . It is part of the SSSI for its seabirds with eight breeding species. The razorbill ("Alca torda") population is of national importance and together with fulmar ("Fulmaris glacialis") and guillemot ("Uria aalge") are the largest in the Isles of Scilly; the other species are kittiwake, great black-backed gull, lesser black-backed gull, herring gull, shag ("Phalacrocorax aristotelis") and puffin. Peregrine falcon ("Falco peregrinus") and raven ("Corvus corax") breed in some years.