Common Cuckoo
Cuculus canorus
The common cuckoo is 32–34 centimetres (13–13 in) long from bill to tail, with a tail of 13–15 centimetres (5.1–5.9 in) and a wingspan of 55–60 centimetres (22–24 in). The legs are short. It has a greyish, slender body and long tail, similar to a sparrowhawk in flight, where the wingbeats are regular. During the breeding season, common cuckoos often settle on an open perch with drooped wings and raised tail. There is a rufous colour morph, which occurs occasionally in adult females but more often in juveniles.
ID text from Wikipedia, CC BY-SA 4.0

Indian Cuckoo
Cuculus micropterus
This is a medium-sized cuckoo with both sexes alike. It has grey upperparts while the underside has broad black barring. The tail is barred with a broad subterminal dark band and a white tip. Young birds have white markings on the crown and white chin and throat contrasting with a dark face. Juveniles are browner and have broad white tips to the head and wing feathers. The eye-ring is gray to yellow (a feature shared with the common hawk-cuckoo). The iris is light brown to reddish.
ID text from Wikipedia, CC BY-SA 4.0

Where you might meet both
Learn this pair in the BeakBrain App
Photo and call practice. Coming soon to iPhone and Android.
Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Common Cuckoo and Indian Cuckoo.