This volume provides a comprehensive, highly detailed topographical description of the entire tail apparatus of the pigeon including a functional analysis of the movements of the entire tail and its appendages, namely the flight feathers. The manner in which the flight feathers are incorporated into the uropygium has never before been so carefully studied. Foremost among the features of the tail described here for the first time is the bulb of the rectrices. The topographic relationships of the bulb, its external and internal architecture, the attachments and arrangements of its flight...