Cuckoo Cuckoo is a kind of singing bird found all over the world. Cuckoo or Conorous means melodious or meaning to sing. English word cuckoo comes from French word. Mostly they were found in Europe. About 100 million cuckoos lived all over the world. The life cycle of this bird is 6 years. Common cuckoo is 34 centimetres long and wing span about 55 centimetres. Greyish in color and have a long tail. They have small feathers with small airflow over the wings and tail. Common cuckoos have variable plumage. Some of them have strong brown upper parts while others have gray. Brown birds have feathers edged creamy white. Flight feathers are the long. Male cuckoos about the weight of 130 grams while female cuckoos about 110 grams weight. Cuckoo family named as Cuculidae belonging to the Genus of Cuculus. The males song usually open perch while female has loud and long sound. The cuckoos start their song of sound in the month April. In the month of June forget its tune. Common cuckoo is ...