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
Rondebosch Common which has covered most of the Cape Flats. The common also conserves a few patches of Renosterveld and a seasonal wetland, giving it a hugely varied biodiversity for such a small area. Of the hundreds of plant species that occur here, at least nine are on the Red Data List. This stretch of land also protects 110 species of bird, as well as small mammals, reptiles and amphibians. The local biodiversity is threatened by invasive plants such as Kikuyu grass. In the past, Rondebosch Common was used as a military camp (hence the name of "Camp Ground Road", which borders