Skellig Islands consent. During the 2014 nesting season, black-legged kittiwake chicks in nests were swept into the sea by the downdraught from a helicopter and devoured by gulls. Both of the Skellig islands are known for their seabird colonies, and together comprise one of the most important seabird sites in Ireland, both for the population size and for the species diversity. Among the breeding birds are European storm petrel ("Hydrobates pelagicus"), northern gannet, northern fulmar ("Fulmarus glacialis"), Manx shearwater ("Puffinus puffinus"), black-legged kittiwake ("Rissa tridactyla"), common guillemot ("Uria aalge"), razorbill ("Alca torda") and Atlantic puffin ("Fratercula arctica") (with 4,000 or more puffins
Procellariidae with "Pseudobulweria" being phylogenetically closer to the "Puffinus" shearwaters than the "Pterodroma" gadfly petrels, and "Aphrodroma" (the Kerguelen petrel) possibly being closely related to the shearwaters or the fulmars. The prions, according to Nunn and Stanley, were among the larger shearwater group. The "Calonectris" shearwaters were placed close to the two "Puffinus" clades (closer to the Puffinus, or small, clade) and both were distant to the "Procellaria" shearwaters. The relationships between the genera and within the genera are still the subject of debate, with researchers lumping and splitting the species and genera within the family and arguing about the position