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
Sabu also called Ibebi to the Double House, feast-day attendant, pleasing every artificer, honored by every sovereign, a member of his court, attached to the heart of his lord, the favorite of his lord's heart, beloved of his lord, revered of Ptah, doing that which the god desired of him every day in the king's presence." Sabu also called Ibebi Sabu called Ibebi was a High Priest of Ptah during the reigns of Kings Unas and Teti. Sabu's mastaba in Saqqara (Mariette's E1) contains several inscriptions showing how the pharaoh favored him. Sabu called Ibebi and his son Ptahshepses share a double mastaba (E