There is but one species of Pica in India containing three subspecies which grade into one another in the areas where they meet, but which are well differentiated over large tracts of country in which their characteristics are quite constant.
Pica differs from Corvus in having a very long graduated tail and in having a first primary of very peculiar shape. The Magpies are, however, more addicted to well-wooded districts; they are equally wary and they are almost omnivorous.
Key to Subspecies.
A. A white rump, sometimes reduced to a
dull grey band.
a. Gloss on wings green P. p. bactriana, p. 38.
b. Gloss on wings blue P. p. serica, p. 39.
B. Rump wholly black P. p. bottanensis, p. 39.