Rallus aquaticus Linn., Syst. Nat., 10th ed., p. 153, Jan, 1758.
Type-locality: Great Britain.
The typical form differs from our Indian forms in having the whole breast a much darker purer grey, the pale supercilium is less distinct and the dark brown line through the eye less developed posteriorly.
The inclusion of the Common Water-Bail in the Indian Avifauna rests upon two supposed specimens obtained in the Dun and a third near Abottabad. All three of these, however, seem to me to be R. a. korejewi, a race very close to the European bird but averaging paler both above and below.
Key to Subspecies.
A. Darker, both above and below…………R. a. indicus, p. 4.
B. Paler, both above and below…………R. a. korejewi, p. 6.