. Bulletin - United States National Museum. Science. AVIAN GENUS CHRYSOCOCCYX 3 the evolutionary history of the glossy cuckoos. The morphological differentiation of the group as evidenced by the apparent phylogenetic relationships of the existing forms is presented in detail. Follomng this, the comparative data on migratory behavior are described to help explain the present geographic distribution of some of the various species of the group. The similarities and the differences in the court- ship habits of the species are then considered for the glimpses of past history they reveal. With this
. Bulletin - United States National Museum. Science. AVIAN GENUS CHRYSOCOCCYX 3 the evolutionary history of the glossy cuckoos. The morphological differentiation of the group as evidenced by the apparent phylogenetic relationships of the existing forms is presented in detail. Follomng this, the comparative data on migratory behavior are described to help explain the present geographic distribution of some of the various species of the group. The similarities and the differences in the court- ship habits of the species are then considered for the glimpses of past history they reveal. With this background as a basis we then discuss each important behavioral segment of the parasitic habit in the glossy cuckoos, with all the data pertinent to the problem of host selection and its evolution; of host specificity; of egg morphism and its importance as evolutionary material; of the mode of egg-laying by the parasites; of removal of host eggs by the cuckoos; and of the highly specialized relations between the nestlings of the hosts and of the parasites. This is followed by a discussion of all that is known of the eviction of nestmates by the nestling cuckoos and of fledgling feeding by the adults. Both of these behavior patterns are highly significant in the biological history of the glossy cuckoos. All these data and all the ideas pertinent to them are then brought together and summarized. An appendix provides in its first part a distributional check list of all the members of the genus Chrysococcyx and in its second shorter part, brings together the earlier and the more recent knowledge of the plumages of one species, hitherto very inadequately described. Phylogenetic relationships. Figure 1. Geographic range of the genus Chrysococcyx. [Shaded area in the Austro- Malaysian region should be taken to refer to land areas only.]. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearanc
Size: 2182px × 1145px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
