THE CHATHAM ISLAND PETREL 



261 



base of toes, yellow; remainder, black. Length of the wing, 9 inches; of 

 the tarsus, 1.2 inches. New Zealand and Japan. 



This bird lives on the Chickens Islands, sometimes in the same 

 burrows as tuataras. Mr. Reischek says that the burrows are 

 from four to six inches in diameter, and from four to twelve feet 

 long, each with two chambers, about a foot in diameter, with 

 leaves, moss, or fine grass at the bottom. "After sunset," to use 



Chatham Island Petrel. 



(Cat. Brit. Mm 



his own words, "they begin to call, like 'ti, ti, ti,' repeated 

 rapidly, which is the signal to assemble for their departure to 

 their ocean haunts, from which they do not return till before 

 sunrise." The eggs are laid early in November, and the young 

 are full grown in March. 



The Chatham Island Petrel. 

 CEstrelata axillaris. 



Like the last species, but the bill stouter and the secondary under 

 wing coverts, as well as the axillaries, black. Length of the wing, 8.3 in.; 

 of the tarsus, 1.2 in. Chatham Islands. 



