PARASITIC JAEGER (not figured). 

 37. Stercorarius parasiticus. 17 in. 



Similar to the next species but tail shorter, 

 bill longer (1.4 in.) and the nostril nearer 

 its tip than the base. Both species have 

 the same range and nesting habits. 

 LONG-TAILED JAEGER. 

 .38. Stercorarius longicaudus. 21 in. 



Bill 1.15 in., the nostril midway between 

 the tip and base. Middle tail feathers length- 

 ened and pointed. 



Eggs. Olive-brown with black spots. 

 Range. Breeds in Arctic regions. Winters 

 off the coast from Me. southward. 

 Family LARID^E. 



IVORY GULL. 

 39. Pagophila alba. 17 in. 



Plumage pure white. Bill and shafts of 

 primaries yellow. Feet black. 



Eggs. Grayish-buff marked with blackish. 

 Range. Breeds in high Arctic latitudes. 

 Winters south rarely to Long Island. 

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