32 GEOLOGICAL SURVEY OF CANADA. 
Birds in the black plumage are rare in the spring, but are some- 
times seen; and at the Yukon mouth, on May 31st, I found a pair 
in this plumage mated. The eggs are laid upon the mossy knolls 
or uplands in their haunts about the 5th of June. The nest is 
merely a depression in the moss, containing two eggs indistin- 
guishable from the next species. (/Ve/son.) 
. Long-tailed Jaeger. Buffon Skua. 
Stericorarius longicaudus VIEILL. 1819. 
Said not to breed farther south than lat, 70° N,, in Greenland, 
(Arct, Man.) A very few of these birds visited the upper waters 
of Cumberland gulf in June, 1871, and soon disappeared ; I doubt 
if they breed there. (Awsmelin,) Occasionally seen from Green- 
land south along the Labrador coast. (Packard.) Newfoundland. | 
(Reeks,) Coast of Nova Scotia, (Dowmns,.) In the Bay of Fundy. 
(Boardman.) Gulf of St. Lawrence, (Duonne.) Occasionally 
taken in Hudson bay. (Dr. RX. Bell.) Less common than the 
former species in Roes Welcome and seen occasionally in the 
waters to the northward. (A, /; Low.) South to Lapierre 
House on the Mackenzie river. (Xoss.) Quite abundant along 
the Anderson river and on the Barren Grounds, and also on the 
Arctic coast. (Jacfarlane.) Two specimens were shot at Ron- 
deau,)Lake Erie, October. 2nd, 1900, by. Mr... Dy Bates, and 
another at the same place by Mr. E, Burk, October 1oth, 1906, 
It has not been satisfactorily decided whether this last bird 1s the 
long-tailed or parasitic jaeger, (WW. Saunders.) A rare bird at 
Aweme, Man, One was taken May 17th, 1903. (C7zddle,) Once 
shot and several times seen during September, 1890 and 18g], at 
Sumas lake, B.C. (Brooks.) This is the most common of the 
Jaegers onthe Alaskancoast; rare on the Pribilof islands. They 
are abundant on the low coast of Bering strait, but, except at 
Kotzebue sound, they are not common beyond that point. (/Vel- 
son.) Arrives earlier at St. Michael and in greater numbers that. 
its congeners ; rarely seen on the eastern Aleutian islands, but a 
few pairs are said to breed near St. Michael. (Zurner.) \ This ts 
the most common species of jaeger at Point Barrow, and is rather 
abundant, but none breed. (Muzurdoch.) 
BREEDING Notres,—The pairing occurs with a great amount 
of noisy demonstrationson the part of several rivals, but once 
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