38 THE O. & O. SEMI-ANNUAL. 
Shetland Islands they make burrows in a cliff like Sand Martens when 
a great number meet together in the same cliff. Like the Manx 
Shearwater, they make a noise in their nest holes which can be dis- 
tinctly heard by the passengers walking on the cliff-top. 
‘This bird as well as the Fulmar Petrel pusesses a singular amount 
of oil, and both species have the power of throwing it from the 
mouth when frightened. In St. Kilda the natives catch both Fulmar 
and Stormy Petrels as they sit closely on their eggs and make them 
disgorge the oil into a can brought for the purpose, they then let the 
bird go and catch another, and in this manner gallons of pure oil are 
collected every season. 
The Stormy Petrel only lays one egg, sometimes at the end of a 
burrow, from one to three feet deep, and other times the egg is laid 
under stones on the sea beach above high water mark. 
A series of thirty eggs before me average in size 1.10 long by .76 
broad. ‘They are usually white, with a faint zone of reddish-brown 
around the larger end of the egg. 
The ground color of this bird is sooty black, and the outer edges 
of the tertials and the upper tail coverts are white. Its length is 
scarcely six inches. . 
MY HUNT FOR THE BLACK-POLL WARBLER. 
Dendroica Striata. 
BY F. I. CARPENTER, ATTLEBOROUGH, MASS. 
The northern journey of the feathered migrants in southern New 
England is nearly completed, and nesting among those that remain 
with us has already begun, when the trained ear of the observer will 
detect faint notes amongst the now dense foliage, that betokens a new 
arrival. 
To the novice, the curious wheezy notes may be mistaken for some 
tiny quadruped, but if he searches closely he will discover a plump 
little warbler in a plain suit of grey and black as the author, and the 
broad, black patch on the crown and head will serve for sufficient 
identification of the species. 
