LIFE HISTORIES OF NORTH AMERICAN PETRELS AND PELICANS, 129 



Winter. — During the latter part of the summer those which have 

 finished breeding wander westward and northward over the At- 

 lantic Ocean even to American shores. They are most frequently 

 seen, from the coasts of Maine and Nova Scotia northward, during 

 the month of August. As casual observers are likely to mistake 

 them for the two commoner species, Leach and Wilson petrels, I 

 suspect that they are often overlooked and may be much commoner 

 than is generally supposed. The stormy petrel can be distinguished 

 from the Leach by its smaller size, square tail, and white flank 

 patches, and from the Wilson by its much shorter legs, which on the 

 latter project beyond the tail in flight; the white in the under side 

 of the wing is also conspicuous in the stormy petrel. 



DISTRIBUTION. 



Breeding range. — Mainly on islands in the northeastern Atlantic 

 Ocean. North to Iceland and northern Norway (Lofoten Islands). 

 On many islands around Great Britain (Shetland, Faroe, Orkney 

 Islands, etc.). East in the Mediterranean Sea to Malta, etc. South 

 to the Madeira Islands. 



Range. — Extends across the North Atlantic Ocean to southern 

 Greenland, Labrador, Newfoundland, and Nova Scotia. Migrates 

 southward along the Atlantic coast of Africa and around the cape 

 to Zanzibar on the east coast. 



Casual records. — Accidental in Ungava (Koksoak River, July 

 and October 9, 1882), Quebec (Godbout, May 18, 1885, and October 

 6, 1889), Nova Scotia (Sable Island, November 4, 1901). Accidental 

 in the interior of Europe. 



Egg dates. — British Isles: Thirty-four records, May 18 to July 

 24; seventeen records, June 6 to July 1. 



OCEANODROMA HORNBYI (Gray). 

 HORNBY PETREL. 



HABITS. 



For over 60 years the only known specimen of this rare and well 

 marked species remained unique in the British Museum. It was 

 procured by Admiral Hornby when he was in command of the 

 Pacific Station with headquarters on Vancouver Island, and is said 

 to have been obtained in the seas oif the northwestern coast of 

 America. It was described by Mr. George Robert Gray in 1853, and, 

 during all these intervening years, not another specimen ever came 

 to light. It has been placed in the hypothetical list in our check 

 list because there seems to be some doubt as to the locality where it 

 was actually taken, the original label having been lost. I am includ- 

 ing it in this work because it seems to me that the indications are 



