How many days do the cuckoo hatch eggs

Rhododendron does not hatch eggs.The breeding of this bird is relatively special. It will produce its eggs in other bird's nests, let other birds be incubated and raised, and at the same time, it will be taken away to prevent the other party from discovering it.Interestingly, according to the different birds it chosen, the color of the bird eggs produced is not the same, but it will definitely be close to the target bird egg.And its chicks hatch faster, and after hatching, other bird eggs will be pushed out of the nest.