TUBE-NOSED SWIMMERS 
105.2. K.eding’s Petrel. Oceanodroma 
L'(cdingi. 
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 leucor- 
hoa. 
Range.- — North Atlantic and North Pacific 
Oceans, breeding from Maine and from the 
Farallones, northward to Greenland and the Aleu- 
tians. 
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 of- 
fensive odor. This odor 
is always noticeable about 
an island inhabited by 
Petrels and is always re- 
tained by the eggs or skins 
White 
IvEeding’s Petrel 
Leach’s Petrel 
Guadalupe Petrel 
of these birds. They are very rarely seen flying in the vicinity of their nest- 
ing island during the day; the bird that is on the nest will remain until re- 
moved by hand. Data. — Pumpkin Is., Maine, June 22, 1893. Single egg; nest 
of a few grasses at the end of a burrow dug in the bank. Collector, J. Lefavour. 
106.1 Guadalupe Petrel. Oceanodroma macrodactyla. 
This species, which is very similar to the preceding, except for a longer 
and more deeply forked tail, breeds on Guadalupe 
Is. Their eggs are white very minutely wreathed .. .. 
with reddish brown; they are, however, nearly al- , M 
ways nest stained to an uneven brownish color. 
Data. — Guadalupe Is., Lower California, March 24 i- 
1897. Single egg laid on a few oak leaves and pine 
needles at the end of a three foot burrow. Size of 
egg 1.40 x 1.00. Collector, A. W. Anthony. 
69 
White, nest stained 
