241. Sterna media.
THE SMALLER CRESTED SEA-TERN.
Male 15" to 17". Legs black. Bill yellow. Crest black. Cheeks, neck, and below white. Mantle grey. Quills dark grey, with white on inside of inner webs.— In winter: Crown black and white, and a black band from nape to the front of the eye. Coasts of Indian Ocean, with Persian Gulf, Red Sea, and Mediterranean. (J. 990. B. 1501.)
Also S8. maxima. 21". Legs clack. Bill orange-red. Neck and tail white. Mantle pearl-grey, with conspicuous white line. Outer webs of primaries grey. America to W. Africa in winter.
S. elegans. 16 1/2." Similar to S. maxima, but bill is longer and more slender. Pacific coast of America.
S. eurygnatha. 17 1/2". Similar to 8. elegans, but bill is yellow. East side of America.