When seen, the male Common Koel is easily identified by its entirely glossy black plumage, tinged with blue and green, and striking red eye. The female has glossed brown upperparts, heavily spotted with white, and a black crown. The underparts are generally buff-cream with numerous fine black bars. Young birds resemble the adult female, but have considerably more buff and a dark eye. The Common Koel is a member of the cuckoo family.
Try to sort it out for yourself, but be reminded, this one is a truly tricky beast! The solution will posted here in the near future, but before then, take your time and try to work it out yourself. This Aquila eagle is clearly not a juvenile, judged by the flight-feathers, which are of different colour and wear, not uniform as they would be on a first-year first-winter bird. Many Aquila species may feature somewhat similarly light plumages at some stage during the plumage development, and particularly both Imperial Eagles, the Tawny Eagle and the fulvescens form of the Greater Spotted Eagle spring to mind. To sort out these eagles a good start would be to study the barring of the flight-feathers, which is diagnostic for most species.
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Both of these species are cavity nesters that tolerate human proximity. Each species can be recognized by its own distinctive chatter. Below are descriptions and photos of both to help you identify them. Need help identifying them?