This comprehensive and up to date illustrated field guide, by palaeontologist Juan Benito and palaeoartist Roc Olivé, aims to illustrate in unprecedented detail the staggering diversity of avialans (modern birds and their closest fossil relatives) that lived from the origin of the group until the Mass Extinction that ended the reign of the non-avian dinosaurs 66 million years ago: the Birds of the Mesozoic.
