Birds of Kerguelen Island . 25 
while on the wing, the band across the chest shows several 
variations in depth of colour. 
-/"OssiFRAGA gigantea (Gm.); Salvin, Cat. B. xxv. p. 422. 
My best opportunities of watching the Giant Petrel were in 
the rookeries (see fig. 2), and on the feeding-grounds newly 
provided for it by the carcasses oi seais which were lying about. 
They soon detect these, and assemble a few hundred yards away 
Fig. 2. 
Rookery of Ossifraga gigantea in Azorella. 
on the water, afterwards approaching singly, little by little, 
with due caution. They seem to feel safer with both wings 
held in a crescent form, for they can thus sooner get away v ith 
