This is the first book to summarize the methods, conceptual issues and results of studies using the interpretation of feather growth rates as an index to nutritional condition in birds. The author has coined the term ptilochronology (literally. 'the study of feather time') to describe this technique, which relies on the fat that as a feather grows it produces visible growth bars. Both the technique and its conceptual foundations have been applied worldwide to numerous studies of avian evolution, ecology, and conservation biology. the author reviews this work, chronicles the various criticisms...

Bird flight has always intrigued mankind. This book provides an up to date account of our existing knowledge on the subject, as well as offering new insights and challenging some established views.
A brief history of the science of flight introduces the basic physical principles governing aerial locomotion. A treatment of flight-related functional morphology concentrates on the difference in shape of the arm and hand part of the wings, on the structure and function of tails, and on the shape of the body. The anatomy and mechanical properties of feathers receive special attention....