Manx shearwaters once bred in huge numbers on the Calf of Man, before being wiped out by rats. An extensive rat control programme has now resulted in small numbers of Manx Shearwaters breeding on the Calf once more. See the Manx Wildlife website for more information about some of the bird species found on the Isle of Man.
http://www.manxwt.org.uk/wildlife/species-explorer/animal/birds