BUFFON’S SKXTi^. 
lOI 
This robbery is often performed by two birds in unison, but 
whether the birds alternate in disposing of the spoil or not 
could not be learned. When a Jaeger is wounded, others of 
its kind show much concern, and I have secured several birds 
in succession which were drawn within range by the cries and 
struggles of their companions. The habits in general of this 
and the following species are extremely similar along the coast 
region of Bering Sea, and both breed abundantly on all that 
broad belt of low barren plains and marshy country bordering 
the coast along the entire northern end of the continent. tVheii 
surprised near its nest it creeps along the ground with flapping 
wings to decoy away the intruder.” 
Nest. — As a rule, a depression in the moss, but Mr. Trevor- 
Battye found one in Kolguev which was among dead water- 
grass in a bog, and was more than a mere depression, for 
grasses had been walled into the lining. 
Eggs,— Two in number. Ground-colour dark chocolate- 
brown varying to light clay -colour, the darker eggs more 
strongly marked with deep brown or blackish, the spots being 
distributed over the greater part of the egg, and the grey under- 
lying markings very indistinct. The pale eggs have the spots 
collected round the larger end, the rest of the egg being rather 
free from markings. Axis, 2'3-2'55 inches; diam. i'5-i'65. 
III. euffon’s skua, stercorarius parasiticus. 
Larus parasiticus, Linn. Syst. Nat. i. p. 226 (1766). 
Lestris parasitica, Macgill. Brit. B. v. p. 503 (1852). 
Stercorarius parasiticus. Dresser, B. Eur. viii. f). 481, pi. 612, 
fig. I (1876); B. O. U. List Brit. B. p. 195 (1883); 
Saunders, ed. Yarrell’s Brit. B. iii. p. 681 (1884); id- 
Man. Brit. B. p. 677 (1889). 
Stercorarius buffoni, Boie ; Seebohm, Hist. Brit. B. iii. p. 358 
(188s). 
Lestris parasiticus, Lilford, Col. Fig. Brit. B. part xxxit. 
(1896). 
Adult Male. — General colour above slaty-grey, the wing-coverts 
and scapulars like the back ; bastard-wing, primary-coverts and 
