MANX SHEARWATER. 323 



Incubation, performed by both sexes, lasts from fifty to 

 sixty days according to Thienemann. 



Diagnostic characters : The egg of the Fuhnar 

 is readily distinguished by its size, absence of markings, 

 and pungent smell. 



Family PROCELLARIID.E. Genus Puff:.nus. 



MANX SHEARWATER. 



PUFFINUS ANGLORUM {TcHUIlinck). 



Single Brooded. Laying season, May and first half of June. 



British Breeding area: The Manx Shearwater 

 has no known breeding-place on the east coast of 

 Scotland, or the east and south coasts of England. It 

 breeds, however, on the Scilly Isles, possibly on Lundy, 

 here and there on the Welsh coast, and in many parts 

 of the west of Scotland among the Hebrides, including 

 St. Kilda, and northwards to the Orkney and Shetland 

 groups. In Ireland it breeds on some parts of the coasts 

 of Waterford and Wexford, possibly on the Blaskets, 

 certainly on the Skelligs rocks, various islets off the 

 coast of Donegal, and on Rathlin, Many other stations 

 undoubtedly yet remain to be discovered. 



Breeding habits : The Manx Shearwater is a resident 

 in the British seas, but during the non-breeding season 

 is subject to much nomadic movement. Its favourite 

 breeding-places are islands with a good ocean aspect, 

 especially such as are broken into grassy downs, and 

 fall in crags and precipices more or less turf-grown. 

 The bird is especially fond of a wide sloping down 

 gently falling to a rock}^ beach on one side, and on the 



