Edward Charles Stuart Baker,
The Fauna of British India, including Ceylon and Burma…
(1922)
“ Where evolution and isolation have evolved forms which are definitely divided from all others by some characteristic which is not one merely of degree, I have treated them as distinct species. In India we are constantly meeting with the most intricate cases of subspecific variation, and a study of birds which admits the recognition of these geographical races and the wisdom of naming them affords infinitely greater interest both to the field and to the scientific worker than does the easier method of lumping them all together. ”
