India has extremely diverse terrain, climate and vegetation, which comprises extremes of heat cold, desert and jungle, of low-lying plains and the highest mountains, of dryness and dampness, islands and continental areas, widely varying flora, and sharply marked seasons.
In addition, India hosts three of the world's biodiversity hotspots: the Western Ghats, the Eastern Himalayas, and the hilly ranges bordering India and Myanmar, each having numerous endemic species.
Accordingly, India's diverse and varied fauna include a rich variety of butterflies and moths.
Brigadier William Harry Evans recorded approximately 1439 species of butterfly from British India, including Ceylon and Burma.
The quoted numbers of species per family are likely to evolve as a result of advances in taxonomy and in the collection of data regarding occurrence and distribution.