8 BULLETIN 292, U. S. DEPARTMENT OF AGRICULTURE. 



the Eastern Hemisphere, where it has been noted to latitude 83°, 

 north of Spitzbergen, but though recorded during the breeding season 

 at numerous places from the eastern coast of Greenland to north- 

 eastern Siberia, there are few if any actual breeding records, except 

 on the islands off the northern coast of eastern Siberia. 



Winter range. — Actual winter records are almost lacking. The 

 species has been taken south to Cape York, in Australia, Walfisch 

 Bay in southern Africa, and Callao Bay in Peru. It seems probable 

 that the regular winter home lies south of the Equator and that indi- 

 viduals recorded with more or less certainty as having occurred in 

 winter on the Orkneys, off the coast of Massachusetts, and on the 

 California coast are stragglers or belated migrants. 



Migration range. — During spring and fall the pomarine jseger occurs 

 as a migrant off both coasts of the United States. It is not rare at 

 either season, but is much more common in fall, when it continues 

 passing the coast of Massachusetts and Long Island Sound until 

 November. As is the case with many other water birds, this species 

 is fairly common south to the eastern end of Long Island, then as the 

 coast turns westward, the birds continue southward out to sea and are 

 unknown along the coast of the rest of North America or anywhere 

 on the eastern coast of South America. Stragglers have twice been 

 taken on the coast of New Jersey at Long Beach (Scott) and Anda- 

 lusia (Vansciver). On the California coast the species is a rare mi- 

 grant in spring and is common, at least near Monterey, from August 

 to October, but it is not recorded along the coast between California 

 and Peru. 



In the interior the pomarine jaeger is rare, but is more than a casual 

 visitor to the lakes of Mackenzie. It was taken near Fremont, Nebr., 

 in May, 1873 (Aughey), and at North Platte, Nebr., November 11, 

 1895 (Barnum). 



Spring migration. — Dates of spring migration in the United States 

 are almost lacking. The birds are said to pass the New England 

 coast in May, but if so, the migration must be quite rapid, for the 

 first arrived June 10, 1823, at Igloolik (Richardson), 2,000 miles 

 north of Massachusetts. Dates of arrival at Point Barrow, Alaska, 

 latitude 71°, are June 24, 1882, June 6, 1883 (Murdoch), and May 23, 

 1898 (Stone). A straggler was taken near Detroit, Mich., May 30, 

 1879 (Collins). 



Eggs have been recorded at Cape Bathurst, Mackenzie, June 20, 

 1901 (Thayer); Cape Lisburne, Alaska, June 10, 1SS5 (Thayer); and 

 Point Barrow, Alaska, June 24, 1898 (Stone). 



Fall migration. — The return movement begins so early that before 

 the young are out of the nest fall migrants are appearing many 

 hundred miles south of the breeding grounds. These early birds 

 must, of course, be those which did not nest or which lost their eggs 



