This sparrow-sized bird is one of the most widespread of the world's kingfishers ranging across Eurasia and North Africa. Males and females are similar but females (below) have a mostly orange mandible. I believe the top bird is a male. Seven subspecies are recognized, three of which occur in India. This is presumably A. a. bengalensis which is smaller and brighter cf. the European races. Note faint greenish cast on the secondaries visible in this photo. However these colors are iridescent and this race is doubtfully separable from the more southern, less green A. a. taprobana with which it intergrades along the Cauvery River. This species sometimes goes under the English names, River Kingfisher or Eurasian Kingfisher. Canon PowerShot SX50 HS
References:
Ali, S & SD Ripley (1987). Compact Handbook of the Birds of India and Pakistan. Edition 2. Oxford University Press.
Fry, Fry and Harris (1991). Kingfishers, Bee-eaters, and Rollers. Princeton University Press
Rasmussen, PC & Anderton, JC (2005). Birds of South Asia. The Ripley Guide. Volume 2. Washington DC and Barcelona: Smithsonian Institution and Lynx Edicions
Woodall, P.F. (2016). Common Kingfisher (Alcedo atthis). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from http://www.hbw.com/node/55801 on 2 May 2016).