Sterna media, Horsf.
990. :- T. bengalensis, Less. :- Jerdon's Birds of India, Vol. II, p. 843 ; Butler, Deccan ; Stray Feathers, Vol. IX, p. 441; Mur ray's Vertebrate Zoology of Sind, p. 321.
THE SMALLER SEA TERN.
Length, 15 to 16 ; wing, 12 ; tail, 6.5 ; tarsus, 1.23 ; bill at front, 2.25.
Bill yellow; irides deep brown ; legs black.
Whole head, including the forehead and occipital crest, glossy-black ; lores, face, sides of neck, and all the lower parts,-white ; upper plumage light silvery-grey, paling slightly on the tail; quills dark grey, white on the inner portion of the inner webs.
In winter plumage the entire forehead and lores are pure white, the crown white, the feathers centred dusky; occiput dusky, the feathers slightly margined with white ; a spot in front of the eye, and a line behind it, black.
The Smaller Sea Tern is most abundant in the Kurrachee Harbour and all along the coasts.
It breeds on islands in the Persian Gulf.