Evolution of birds

This chapter explores the evolutionary history of birds. It considers the dinosaur origins of birds and the evolution of the modern bird lineages. The development of the modern bird from its prehistoric, reptilian ancestors is analysed by discussion of important fossil specimens, particularly that of Archaeopteryx, and the development of both morphological and biomolecular phylogenies. Evolution by natural selection is explained, as are processes of evolutionary adaptation and speciation. The conservation implications of hybridization are considered and the classification and nomenclature of birds is introduced. Throughout the chapter examples of current research are presented alongside established classic studies to engage the reader and provide a route into the relevant scientific literature.