Does a great job of defining how a feather-based bird identification guide should be， although it is not targetted for forensic purposes， might not work with fragments - for use in BASH studies。 The graphical and quantitative approaches to defining variation in feather lengths are excellent， as are the attempts to create a uniform approach to describing patterns。 Unfortunately these may not be straightforward for extending to other parts of the world where some odd birds may have unusual feather Does a great job of defining how a feather-based bird identification guide should be， although it is not targetted for forensic purposes， might not work with fragments - for use in BASH studies。 The graphical and quantitative approaches to defining variation in feather lengths are excellent， as are the attempts to create a uniform approach to describing patterns。 Unfortunately these may not be straightforward for extending to other parts of the world where some odd birds may have unusual feather / integumentary structures。 。。。more