24 SHEARWATERS. 



isphere : found off our coast from May until Dec. Yery com- 

 mon. 



2. CORY'S SHEARWATER, P. borealis. Similar to 1, 

 lighter above : bill, yellowish and somewhat larger ; the ashy 

 markings on the sides of the head extend down lower on 

 the throat, and grade into the white without any sharp line 

 of demarkation. Coast of Mass., R. I., and L. I. from Aug. 

 to Nov. ; breeding and other range unknown. Common some 

 years. 



3. AUDUBON'S SHEARWATER. P. auduboni. 12.00 

 long; dark sooty-brown above; white beneath ; under tail 

 coverts, dusky ; patch in front of folded wing, ashy ; space 

 beneath eye, slightly dusky, otherwise line of demarkation 

 between the dark top of head and white of its sides is sharp- 

 ly defined ; bill, blue-black. Downy young, dusky-brown 

 above; lighter beneath, plate 2. Flight, swift and direct in 

 the daytime, more erratic at night about the breeding places. 

 Cries, when disturbed, harsh and discordant : breeding notes, 

 given at night, mellow and rather musical, uttered in a mi- 

 nor key when the bird is flying, '•que-re-a-var^\ accented on 

 the second and fourth syllables, but mainly on the second 

 with the last prolonged. Nests, placed in cavities of rocks, 

 beneath loose slabs, in caves, and sometimes in the shelter 

 of creeping vines; eggs, deposited from March 15 to April 

 15. Warmer parts of the Atlantic : casual as far north as N. 

 J. and L, I. ; breeds on the Bahamas and Bermudas; com- 

 mon ; rare in the vicinity of the Bahamas in winter. 



4. MANX SHEARWATER, P. PUFFiNUS. Similar to 3, 

 larger, 14.00, and with the black of head extending some- 

 what below eye. North Atlantic, chiefly on the eastern side, 

 casual off our coast. 



5. SOOTY SHEARWATER. P. fuliginosa. 1(5.00 long; 

 similar in form and habits to 1 ; sooty-brown throughout, 

 darkest on wings and tail, palest beneath. Atlantic Ocean ; 

 breeds in the southern hemisphere; occurs oft" our coast 

 from S. C. northward from July 1 until Sep. 



