St Levan common species such as northern gannet ("Morus bassanus"), Manx shearwater ("Puffinus puffinus"), common guillemot, ("Uria aalge") and razorbill ("Alca torda"), as well as rarer birds such as Balearic shearwater ("Puffinus mauretanicus") and Cory's shearwater ("Calonectris borealis"). The headland of Tol-pedn (or Gwennap Head) is favoured by birdwatchers and many travel the length and breadth of Britain to track rare seabirds. Some of the butterflies that can be found on the coast include grayling ("Hipparchia semele"), silver-studded blue ("Plebejus argus"), small pearl-bordered fritillary ("Boloria selene") and wall ("Lasiommata megera"). There is also a day-flying moth, the thrift clearwing ("Synansphecia muscaeformis"); the
Diego Garcia Other nesting native birds include red-tailed tropicbirds ("Phaethon rubricauda"), wedge-tailed shearwaters ("Puffinus pacificus"), Audubon's shearwater ("Puffinus iherminierii"), black-naped terns ("Sterna sumatrana"), white (or fairy) terns ("Gygis alba"), striated herons ("Butorides striatus"), and white-breasted waterhens ("Amaurornis phoenicurus"). The 680-hectare Barton Point Nature Reserve was identified as an Important Bird Area for its large breeding colony of red-footed boobies. The island hosts introduced bird species from many regions, including cattle egrets ("Bubulcus ibis"), Indian barred ground dove, also called the zebra dove ("Geopelia striata"), turtle dove ("Nesoenas picturata"), Indian mynah ("Acridotheres tristis"), Madagascar fody ("Foudia madagascariensis"), and chickens ("Gallus gallus"). Currently, three