KAEDING PETREL. 
105.2. Oceanodroma kaedingi. IV-i inches. 
This bird is similar to the following, but a trifle smaller and 
the tail less deeply forked. Its range is from northern Cali¬ 
fornia 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 Aleu¬ 
tians. 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; plac¬ 
ing 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. 
37 
