Just look at the colours on this male Asian Koel, कोयल.
The female lays one egg, sometimes two, in the nest of a jungle crow, house crow, or even black drongo or magpie. Eggs are typically laid 1.5 days after the crow lays its eggs, and one crow egg is usually thrown out by the koel. The young hatch three to five days before the crow eggs, and initially call like a crow. Unlike other cuckoos, the koel young do not usually throw out other crow eggs, or throw out or kill the baby crows. Mommy koel sometimes visits the host nest to feed its baby.
The female lays one egg, sometimes two, in the nest of a jungle crow, house crow, or even black drongo or magpie. Eggs are typically laid 1.5 days after the crow lays its eggs, and one crow egg is usually thrown out by the koel. The young hatch three to five days before the crow eggs, and initially call like a crow. Unlike other cuckoos, the koel young do not usually throw out other crow eggs, or throw out or kill the baby crows. Mommy koel sometimes visits the host nest to feed its baby.