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
Huma bird Huma bird The Huma (, pronounced "Homā", Avestan: "Homāio"), also Homa, is a mythical bird of Iranian legends and fables, and continuing as a common motif in Sufi and Diwan poetry. Although there are many legends of the creature, common to all is that the bird is said never to alight on the ground, and instead to live its entire life flying invisibly high above the earth. There are numerous folk interpretations of the name, among them that of the Sufi teacher Inayat Khan, who supposed that "in the word "Huma", "hu" represents spirit, and the word "mah" originates from