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 Tjety Sabu also called Tjety Sabu also called Tjety was the High Priest of Ptah in the Sixth Dynasty of Ancient Egypt, around 2300 BC. Sabu is mainly known from the remains of his mastaba in Saqqara (E.3). The inscriptions on the fragment of a false door were copied in the Nineteenth Century and present part of a biography. The fragments are today in the Egyptian Museum in Cairo. Sabu bears several titles including: "Greatest of the Directors of the Craftsmen in the two houses" ("wr ḫrpw hmwt m prwy" - this is the title held by the "High Priest of