Porthgwarra to Pordenack Point heath, and for being of considerable ornithological interest; especially for passage migrants. The southern section, Tol Pedn or Gwennap Head, in particular is favoured by birdwatchers and many travel the length and breadth of Britain to track rare seabirds. The headland is renowned for its relative abundance of passing marine bird species with many common species such as northern gannet ("Morus bassanus"), Manx shearwater ("Puffinus puffinus"), common guillemot, ("Uria aalge"), razorbill ("Alca torda"), northern fulmar ("Fulmarus glacialis"), shag ("Phalacrocorax aristotelis") and cormorant ("Phalacrocorax carbo"). Forty-five breeding species have been recorded including the red-billed choughs ("Pyrrhocorax pyrrhocorax") which have recently been
Audubon's shearwater homogeneous north-western Indian Ocean range, but not in the ecologically more diverse and by far larger Pacific range of "dichrous". These unresolved problems notwithstanding, this clade – possibly including the preceding one – has been proposed to constitute a separate species, the tropical shearwater or Baillon's shearwater, "Puffinus bailloni". These taxa could not be included in the most recent studies due to lack of material. The case of "gunax" seems fairly straightforward – as certainly as this can possibly be said in the absence of new data, it belongs to the "bailloni" clade either as a distinct subspecies, or, more