74 



THE BIEDS OP AUSTRALIA 



plumage is white, the bill and feet black. Total length 17 inches, wing 

 13%, tail 6, tarsi 1%. Three or four eggs are laid, of a yellowish-stone 

 colour, blotched with dark brown and grey markings, dimensions 2.10 x 

 1.47 inch. 



The Caspian Tern. 



Hydroprogne caspia. 



Cosmopolitan. 



In breeding plumage, forehead, crown, and nape greenish-black; 

 mantle light grey, tail greyish white; underparts white; bill red. In 

 moulting season crown and nape streaked with white and black. Total 

 length about 20 inches, culmen 3.3, wing 16.5, tail 6, depth of fork 1.25: 

 the dimensions of these birds vary considerably. 





"The Emu.' 



Crested Tern : Sterna beroii. 



A. J. Camphell. 



Nest a slight depression in the ground, either well above the 

 sea on small islands or on the sand spits. Two eggs form the 

 usual clutch, and are brownish stone colour, blotched all over 

 with irregular dark brown markings, those under the surface 

 being the usual grey. They measure about 2.43 x 1.63 inch. 



The Roseate Tern. 



Sterna gracilis. 



Coasts of Europe, Africa, Asia, and Northern Australia. 



Forehead, crown, and nape black, neck white, mantle light grey, 

 primaries darker, the inner margins of their webs with white borders, 

 tail light grey to white, outer webs of the long streamers quite white; 



