“This is an insightful and original work, comprehensive and up to date, covers many interesting ideas, and is particularly good on inclusion of recent genetic information on the process of speciation in birds. It will be the best work available on its topic, the behavioral and genetic causes and consequences of speciation in birds.”
– Robert Payne, Curator of Birds and Professor of Zoology, University of Michigan Museum of Zoology

“An insightful and thought-provoking treatise on speciation and its consequences in birds, the taxon that brought you the biological species concept and the doctrine of allopatric speciation. This book delivers a grand update that expands our understanding of the role of ecology and behavior.”
– Dolph Schluter, Professor and Canada Research Chair, University of British Columbia, and the author of The Ecology of Adaptive Radiation

“As the literature in any field explodes there is simultaneously an increasing need for synthesis yet an increasing difficulty in achieving it. This is certainly true for the ever-popular subject of ornithology. Trevor Price takes up the challenge to explain how birds speciate, and succeeds magnificently. It is a comprehensive review of all the major ideas, beautifully illustrated with pictures of birds. More than 1300 works are cited, but more impressive is the range of subjects, from genetics to biogeography, from the reconstruction of phylogeny to ecology and the causes of reproductive isolation, all discussed with admirable clarity. If they were alive today Ernst Mayr would bestow patrician approval on this work of scholarship, and Theodosius Dobzhansky would applaud from the side-lines.”
– Peter R. Grant, Class of 1877 Professor of Zoology, Princeton University, and the author of Ecology and Evolution of Darwin's Finches

“I enjoyed reading this book. It is packed with new ideas presented in a rich context of natural history. The engaging text will stimulate and guide graduate students and researchers alike in a fundamentally important area of research.”
– Robert E. Ricklefs, 
Curators' Professor of Biology,
 University of Missouri at St. Louis, and the author of The Economy of Nature

“Speciation in Birds is a significant advance in our understanding of the genesis and maintenance of biological diversity.  It will be a “must read” not only for ornithologists, but for evolutionary biologists of all stripes—this is the most synthetic and innovative treatment of speciation ever published for any group of organisms. The cliché is certainly overused, but Trevor Price is truly someone who thinks “outside the box.”  He continually looks at questions in new ways and comes up with novel perspectives on important issues in the field.”
– Jonathan B. Losos, Curator in Herpetology in the MCZ and Monique and Philip Lehner Professor for the Study of Latin America, Harvard University