KAEDING PETREL.
105.2. Oceanodroma kaedingi. 7½ inches.
This bird is similar to the following, but a trifle smaller and the tail less deeply forked. Its range is from northern California to Mexico, breeding in the southern part of its range.
LEACH PETREL.
106. Oceanodroma leucorhoa. 8 inches.
These are quite common on both the eastern and western coasts, breeding from the Farallones northward to the Aleutians. They are of a sooty brown color, upper tail-coverts and side of under-coverts white. They burrow in the ground for two or three feet, but make no attempt at nest building; placing their single white egg on the bare ground at end of burrow. These birds generally take turns in the task of incubation, one remaining at sea during the day and returning at night. They are rarely seen in the vicinity of their nests during the day.
GUADALUPE PETREL.
106.1. Oceanodroma macrodactyla.
Very similar to the preceding, having more of a forked tail and somewhat longer. Breed on the islands of Lower California.
Nest.—Same as above with one white egg, usually much nest stained.