FAM. LVII. FULMARS, SHEAB.WATERS, ETC. 315 



waters derive their name from their habit of strongly and 

 swiftly " shearing the crests of the waves and skimming the 

 billows with marvelous ease and without visible motion of the 

 pinions." (Dr. Coues.) 



Key to the Species 



* Under mandible not hooked at tip ; ' wing, 11-14 long 1. Fulmar. 



* Under mandible hooked at tip much like the upper,^ or else with wings 



under 7 long. (A.) 



A. Wings, 4-7 long. (E.) 



A. Wings, 7-15 long. (B.) 



B. Wings, 13^-15 long ; culmen over 2 long 2. Cory's Shearwater. 



B. Wings, 11-13^ long ; culmen, 1^-2 long. (D.) 

 B. Culmen under 1 J long. (C. ) 



C. Wing, 11-12 long 6. Black-capped Petrel. 



C. Wing, 7-10 long 4. Audubon's Shearwater. 



D. Under parts dusky 5. Sooty Shearwater. 



D. Under parts white 3. Greater Shearwater. 



E. Tail forked for over a half inch ^ 8. Leach's Petrel. 



E. Tail square. (F.) 

 F. Upper tail coverts white ; nails flat and obtuse *.. 9. Wilson's Petrel. 



F. Upper tail coverts tipped with black ; nails hooked, acute'' 



7. Stormy Petrel. 



1. Fulmar (86. Fulmams glaciMis). Light phase. — A large 

 white bird with slaty-gray mantle and nearly black wing 

 quills ; the tail the 

 color of the back. 

 Dark phase. — A 

 nearly uniform dark, 

 slaty-gray bird. 

 This bird is a con- 

 stant attendant upon 

 fishermen on their 

 trips to the fishing 

 banks, living upon 

 the offal which is 



Fulmar 



