EGGS OF NORTH AMERICAN BIRDS. 



ORDER IL — LONGIPSNNES. Long- winged 

 Swimmers. 



Nests, placed on the ground, or on rocky cliffs, and occasion- 

 ally in trees or bushes. 



Family IV. — STERCORARIID^. Skuas and J^gebs. 



Eggs, dark in color, rather obscurely marked, and j^laced on 

 the ground. 



35. Skua, Megalestris skua. Eggs, 2 or 3, oval, olive 

 brown, rather obscurely blotched with dark brown ; 1.95 -|- 

 2.75 to 2.00 -j- 2.90. Large size and dark color distinguish this 

 species. Breeds on coasts of North Atlantic, from the Shet- 

 land Islands, northward, in June. The bird is only occasion- 

 ally found oil the American coast. 



36. PoMARiNE J^GER, Stevcorarius pomarimis. Eggs, 2 

 or 3, rounded oval, deep olive drab, sparingly spotted with 

 slate color and a few reddish dots and blotches; size, between 

 those of Nos. 35 and 36; 1.70 + 2.25 to 1.75 -f 2.80. Breeds 

 in the northern portions of the Northern Hemisphere. 



37. Parasitic J^ger, iStercorarius parasiticus. Eggs, 2 

 or 3, oval, deep yellow or greenish brown, spotted and blotched 

 with varying shades of brown and umber; 1.55 -|- 2.12 to 1.60 

 -\- 2.35. Not to be readily distinguished from those of No. 86. 

 Breeds in high latitudes, on the European coast, from the Shet- 

 land Islands, northward. 



38. Long-tailed J^gee, Stercorarius longicaudus. (Tyj)e, 

 Plate II.) Eggs, 2 or 3, oval, deep yellowish brown, spotted 

 and blotched with varying shades of dark brown and umber; 

 1.50 + 2.15 to 1.56 + 2.25. The smallest of the Jaegers. 

 Breeds in high latitudes of the Northern Hemisphere. 



Family V. — LARID^. Gulls and Terns. 



Nests placed on cliffs, trees, or bushes, and often on the 

 ground. 



