10 
jaegers were seen with them, holding back for a while outside the throng, 
and then getting up to chase a gull victim that had made a capture. Both 
were secured and proved to be male and female, apparently non-breeders, 
in good feather. In the Pomarine, the two central tail feathers are very 
characteristic; wide, rounded on the end, twisted a little so that they 
form a trough beyond the remainder of the tail, and not unduly prolonged. 
Both birds secured agreed in this. Very black and sinister birds in appear- 
ance and comparatively slow in flight. 
Next day two more of the same dusky pirates that came into the inner 
harbour to worry the gulls were shot as they went out. 
On August 1 one was seen off cape Shipunski, Kamchatka, and next 
day several were seen off cape Kronosti, but the species was not met again 
until August 15, when two lone birds near Forrester island on the American 
side completed observations. 
9 Petropavlovsk, Kamchatka. July 30 
8 “ “ “ 30 
6 “ « “ 31 
9 " “ “ 31 
All in similar white-breasted plumage. These specimens corroborate Taczanowski’s report 1 
for the species and seem to constitute the only subsequent record for Kamchatka. 
Stercorarius parasiticus (Linnaeus). Parasitic Jaeger 
On August 3, at Nikolski, Bering island, when Lieut.-Col. Broome 
returned from a visit by dog-sled to the fur seal rookery — there was no 
snow, of course, at this time — he described so well the antics of a pair of 
birds encountered on the tundra, as to leave no doubt that they were 
jaegers. His description was accurate and he even drew a diagram of the 
tails of the birds. The latter played the cripple trick, followed the party, 
and plainly were nesting. As Stejneger found the Parasitic Jaeger breeding 
and no other, it is almost a certainty that these birds were of that species. 
On August 5, north of Attu, six jaegers in a flock, supposedly this 
species, were seen at a distance and later in the day “about 5 p.m., a small 
sandpiper came close to the ship and at the same time a Parasitic Jaeger — 
(judged so from its short, sharp tail-spike, small size, and activity awing) — 
also appeared and at once made for the sandpiper and chased it wickedly 
for some time. The jaeger could out-fly but not out^dodge the little 
victim. The latter tried three times to board us and once settled on the 
winch cover before the bridge. But some member of the crew always 
scared it off and when last seen it was flying low, dodging away over the 
swell.” 
On August 14, 300 miles west of Prince Rupert, jaegers were the com- 
monest birds seen all day, travelling often in companies of three and four, 
but identity could only be guessed. 
Stercorarius longicauda Vieillot. Long-tailed Jaeger 
Only on one occasion was this jaeger certainly recognized, when on 
July 19, near Petropavlovsk, one came close to the ship. Quite probably 
some of the jaegers seen distantly in Bering sea were this form and on 
August 12 a flock of six far at sea were almost certainly longicauda. 
1 Vide Stejneger, “Explorations in Kamtschatka,” p. 331. 
