Common cuckoo lay eggs that better imitate the host's eggs, the host species adapts and is more able to distinguish the cuckoo egg. A study of 248 common cuckoo and host eggs demonstrated that female cuckoos that parasitised common redstart nests laid eggs that matched better than those that targeted dunnocks. Spectroscopy was used to model how the host species saw the cuckoo eggs. Cuckoos that target dunnock nests lay white, brown-speckled eggs, in contrast to the dunnock's own blue eggs. The theory suggests that common redstarts have been parasitised by common cuckoos for longer, and so have evolved to be better
The Golden Bird mythical beasts, a Sultan's game of hide-and-seek and his marriage with the Sultan's beautiful daughter. The Golden Bird "The Golden Bird" is a Brothers Grimm fairy tale, number 57, about the pursuit of a golden bird by a gardener's three sons. A French version, collected by Paul Sébillot in "Littérature orale de la Haute-Bretagne", is called "Le Merle d'or" (The Golden Blackbird). Andrew Lang included that variant in "The Green Fairy Book" (1892). It is Aarne-Thompson folktale type 550, "The Golden Bird", a Supernatural Helper. Other tales of this type include "The Bird 'Grip'", "The Greek Princess and the Young