European Roller
Coracias garrulus
The European roller is a stocky bird, the size of a Eurasian jay at 29–32 cm (11–13 in) in length with a 52–58 cm (20–23 in) wingspan. It is mainly blue with an orange-brown back. The subspecies C. g. semenowi is slightly paler then the nominate. The European roller is striking in its strong direct flight, with the brilliant blue contrasting with blue-black ends of the flight feathers. Sexes are similar, but the juvenile is a drabber version of the adult. The European roller is similar in appearance and behaviour to the Abyssinian roller.
ID text from Wikipedia, CC BY-SA 4.0

Indian Roller
Coracias benghalensis
The Indian roller is a bulky and broad-winged bird with a large head and short neck and legs. It has a body length of 30–34 cm (12–13 in) with a wingspan of 65–74 cm (26–29 in) and weighs 166–176 g (5.9–6.2 oz). The bare skin around the eyes is dull orange, the legs and feet are yellow-brown. The bill is tinged with brown at the base. The iris is grey-brown. The plumage on the forehead, chin and lores are pinkish buff, the ear coverts are darker red-brown with pale cream or pinkish streaks, while the throat is a dull wine-red with narrow cream streaks. Voice: The Indian roller has a monosyllabic contact call which varies from a short chack to a longer, harsher tschow. Kaarsch calls are made during rolling displays, and increase in frequency and volume as the bird flies towards an intruder. When perched side by side, rollers make staccato chattering.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: European Roller and Indian Roller.