upischa._

This sub-species of the preceding, has a darker mantle than the common
Fulmar; it is found on the northern Pacific coasts where it breeds on
the high rocky cliffs, the same as its eastern relative. They nest in
large colonies, every crevice in the rocks having its tenant. Their
flight is graceful like that of the Gulls, which they closely resemble.
They lay but a single white egg, the average dimensions of which are
slightly smaller than those of the common Fulmar. Data.--Copper Is.,
Alaska. May 14, 1889. Egg laid in a crevice among the cliffs.

86.1. RODGER'S FULMAR. _Fulmarus rodgers._

Range.--North Pacific, breeding in large numbers on some of the islands
in Bering Sea; south to California in winter. Very similar to the two
preceding species except that the back is mixed with whitish, it is not
believed to have a dark phase. Their breeding habits and eggs do not
differ from the common Fulmar. The eggs are laid on the rocky cliffs
during June.

87. SLENDER-BILLED FULMAR. _Priocella glacialoides._

Range.--Southern seas, appearing on the Pacific coast of the United
States in the summer. This species has a paler mantle than the others of
the family, and the primaries are black. The make-up and plumage of the
whole bird is more like that of the Gulls than any of the others. They
probably breed in the far south during our winter, although we have no
definite data relative to their nesting habits.

[Illustration 065: Pacific Fulmar. Slender-billed Fulmar.]
[Illustration: deco.]
[Illustration: right hand margin.]

Page 64

88. CORY'S SHEARWATER. _Puffinus borealis._

This species probably breeds in the far south. It has been found only
off the coast of Massachusetts and Long Island. This is the largest of
our Shearwaters, and can be distinguished from the next species by its
wholly white underparts, its light mantle and yellowish bill. We have no
data relative to its nesting habits.

89. GREATER SHEARWATER. _Puffinus gravis._

Range.--The whole of the Atlantic Ocean.

Thousands of them spend the latter part of the summer off the New
England coast, where they are known to the fishermen as Haglets. Their
upper parts are brownish gray, darker on the wings; bill and feet dark;
underparts white, with the middle of the belly and the under tail covers
dusky. Length about 20 inches. Little is known concerning their nesting
quarters, although they are said to breed in Greenland. From the fact of
the