TUBE-NOSED SWIMMERS 



105.2. K.eding's Pethel. Oceanodroma 

 livdingi. 



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 Pethki. 

 lioa. 



Oceanodroma Icucor- 



Range. — North Atlantic and North Pacific 

 Oceans, breeding from Maine and from the 

 Parallones, 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 



Ktieding's Petrel 



Leach's Petrel 



Guadalupe Petrel 



Petrels and is always re- 

 White tained by the eggs or skins 



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- 

 ways nest stained to an uneven brownish color. 

 Data.— Guadalupe Is., Lower California, March 24 

 1897. Single egg laid on a few oak leaves and pinr 

 needles at the end of a three foot burrow. Size ot 

 egg 1.40x1.00. Collector, A, W. Anthony. 



69 



White, nest stained 



