lantic Ocean chiefly on the European side, wintering south to
New Brunswick. Smallest of the white rumped, black petrels; 5.75 inches
in length.

This species is the originally called "Mother Cary's Chicken" by the
sailors. They nest abundantly on many of the islands off the coasts of
Europe and the British Isles, laying their single egg either in burrows
or crevices among the cliffs. Data.--Coast of County Kerry, Ireland,
June 1, 1895. Single egg laid at the end of burrow in a sea cliff. Size
1.05 x .80; white with a wreath of very fine dots about the larger end.
Collector, G. H. McDonald.

105. FORKED-TAILED PETREL. _Oceanodroma furcata._

Range.--North Pacific from California to Alaska, breeding in the
Aleutians.

These birds have a plumage of bluish gray, the wings being darker and
the underparts lightest. The nests are made in burrows or crevices in
the banks. Data.--Uniak Is., Alaska, June 10, 1900. No nest. Single egg
laid at the end of a burrow. Several pairs nesting near. Egg white with
a fine wreath of purplish black specks about the large end. Size 1.25 x
.95.

[Illustration 070: White.]
[Illustration: Least Petrel. Stormy Petrel. Forked-tailed Petrel.]
[Illustration: deco.]
[Illustration: left hand margin.]

Page 69

105.2. KAEDING'S PETREL. _Oceanodroma kaedingi._

This bird is similar to Leach Petrel, but is smaller and the tail is
less deeply forked. Its range is from California to Panama breeding on
the Revillagigedo Islands off Mexico.

106. LEACH'S PETREL. _Oceanodroma leucorhoa._

Range.--North Atlantic and North Pacific Oceans, breeding from Maine and
from the Farallones, northward to Greenland and the Aleutians.

These are the most common of the Petrels found on our coast; they are
eight inches in length, of a sooty brown color, and have a white rump.
The forked tail will at once distinguish them from any of the Atlantic
Petrels. They nest in burrows in the ground, laying a pure white egg,
sometimes with a very faint dusty wreath about the larger end. Size 1.20
x .95. These birds generally take turns in the task of incubation, one
remaining at sea during the day and returning at night while his mate
takes her turn roving the briny deep in search of food. The young are
fed by regurgitation upon an oily fluid which has a very offensive odor.
This odor is always noticeable about an island inhabited by Petrels and
is always retained by the eggs or skins of these birds. They are very